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  • 一本通提高篇

    1422

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 struct dat
 5 {
 6     int s,f;
 7 } a[1100];
 8 int res,n,t;
 9 bool cmp(dat x,dat y)
10 {
11     return x.f < y.f;
12 }
13 int main()
14 {
15     scanf("%d",&n);
16     for (int i = 1;i <= n;i++)
17         scanf("%d%d",&a[i].s,&a[i].f);
18     sort(a + 1,a + n + 1,cmp);
19     t = a[1].f;
20     res = 1;
21     for (int i = 2;i <= n;i++)
22         if (a[i].s >= t)
23         {
24             res++;
25             t = a[i].f;
26         }
27     printf("%d
",res);
28 }
    View Code

    1423

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 struct dat
 9 {
10     int s,f,v;
11 } a[5100];
12 int n,m,res;
13 bool tre[31000];
14 bool cmp(dat x,dat y)
15 {
16     return x.f < y.f;
17 }
18 int main()
19 {
20     scanf("%d%d",&n,&m);
21     for (int i = 1;i <= m;i++)
22     {
23         scanf("%d%d%d",&a[i].s,&a[i].f,&a[i].v); 
24     }
25     sort(a + 1,a + m + 1,cmp);
26     for (int i = 1;i <= m;i++)
27     {
28         int sum = 0;
29         for (int o = a[i].s;o <= a[i].f;o++)
30             if (tre[o] == true)
31                 sum++;
32         if (sum >= a[i].v)
33             continue;
34         else
35         {
36             
37             for (int o = a[i].f;o >= a[i].s;o--)
38             {
39                 if (!tre[o])
40                 {
41                     sum++;
42                     tre[o] = true;
43                     res++;
44                     if (sum >= a[i].v)
45                         break;
46                 }
47             }
48         }
49     }
50     printf("%d
",res);
51     return 0;
52 }
    View Code

    1424

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 struct dat
 9 {
10     double x,y;
11 } a[21000];
12 int T,ans,cnt,l,w,n,t;
13 bool suc;
14 bool cmp(dat x,dat y)
15 {
16     return x.x < y.x;
17 }
18 int main()
19 {
20     scanf("%d",&T);
21     for (int i = 1;i <= T;i++)
22     {
23         cnt = ans = 0;
24         suc = true;
25         scanf("%d%d%d",&n,&l,&w);
26         int tx,tr;
27         for (int i = 1;i <= n;i++)
28         {
29             scanf("%d%d",&tx,&tr);
30             if (tr <= w / 2)
31                 continue;
32             cnt++;
33             a[cnt].x = tx - sqrt(tr * tr - w * w / 4.0);
34             a[cnt].y = tx + sqrt(tr * tr - w * w / 4.0);
35         }
36         sort(a + 1,a + cnt + 1,cmp); 
37         double t = 0.0;
38         int i = 1;
39         while (t < l)
40         {
41             ans++;
42             double s = t;
43             for (;a[i].x <= s && i <= cnt;i++)
44                 if (t < a[i].y)
45                     t = a[i].y;
46             if (t == s && s < l)
47             {
48                 printf("-1
");
49                 suc = false;
50                 break;
51             }
52         }
53         if (suc == true)
54             printf("%d
",ans);
55     }
56     
57     return 0;
58 }
    View Code

     1425

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 int n,a[11000],b[11000],m[11000],ans[11000],s[11000];
 9 int main()
10 {
11     scanf("%d",&n);
12     for (int i = 1;i <= n;i++)
13         scanf("%d",&a[i]);
14     for (int i = 1;i <= n;i++)
15         scanf("%d",&b[i]);
16     for (int i = 1;i <= n;i++)
17     {
18         m[i] = min(a[i],b[i]);
19         s[i] = i;
20     }
21     for (int i = 1;i <= n - 1;i++)
22     {
23         for (int j = i + 1;j <= n;j++)
24             if (m[i] > m[j])
25             {
26                 swap(m[i],m[j]);
27                 swap(s[i],s[j]);
28             }
29     }
30     int k = 0,t = n + 1;
31     for (int i = 1;i <= n;i++)
32     {
33         if (m[i] == a[s[i]])
34         {
35             k++;
36             ans[k] = s[i];
37         }else if (m[i] == b[s[i]])
38         {
39             t--;
40             ans[t] = s[i];
41         }
42     }
43     k = 0;
44     t = 0;
45     for (int i = 1;i <= n;i++)
46     {
47         k += a[ans[i]];
48         t = max(k,t); 
49         t += b[ans[i]];
50     }
51     printf("%d
",t);
52     for (int i = 1;i <= n;i++)
53         printf("%d ",ans[i]);
54     return 0;
55 }
    View Code

    1426

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 struct dat
 9 {
10     int t,v;
11 };
12 bool cmp(dat x,dat y)
13 {
14     return x.v > y.v;
15 }
16 int m,n;
17 dat a[510];
18 bool use[510];
19 int main()
20 {
21     scanf("%d%d",&m,&n);
22     for (int i = 1;i <= n;i++)
23         scanf("%d",&a[i].t);
24     for (int i = 1;i <= n;i++)
25         scanf("%d",&a[i].v);
26     sort(a + 1,a + n + 1,cmp);
27     bool suc;
28     for (int i = 1;i <= n;i++)
29     {
30         suc = false;
31         for (int j = a[i].t;j >= 1;j--)
32         {
33             if (use[j] == false)
34             {
35                 suc = true;
36                 use[j] = true;
37                 break;
38             }
39         }
40         if (suc == false)
41         {
42             m -= a[i].v;
43         }
44     }
45     printf("%d
",m);
46     return 0;
47 }
    View Code

    1433

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 const int MAXN = 110000;
 5 int n,c,a[MAXN];
 6 bool check(int d)
 7 {
 8     int cnt = 1,pos = a[1] + d;
 9     for (int i = 2;i <= n;i++)
10     {
11         if (a[i] < pos)
12             continue;
13         cnt++;
14         pos = a[i] + d;
15     }
16     if (cnt >= c)
17         return true;
18     return false;
19 }
20 int main()
21 {
22     scanf("%d%d",&n,&c);
23     for (int i = 1;i <= n;i++)
24         scanf("%d",&a[i]);
25     sort(a + 1,a + n + 1);
26     int l = 0,r = a[n] - a[1];
27     while (l < r)
28     {
29         int mid = l + r + 1 >> 1;
30         if (check(mid))
31             l = mid;
32         else
33             r = mid - 1;
34     }
35     printf("%d
",l); 
36     return 0;
37 }
    View Code

    1434

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 const double eps = 0.000001;
 9 int n,L;
10 double a[110000],b[110000],sum[110000],ans,minn;
11 int main()
12 {
13     scanf("%d%d",&n,&L);
14     for (int i = 1;i <= n;i++)
15         scanf("%lf",&a[i]);
16     double l = -1000000.0,r = 1000000.0;
17     while (r - l > eps)
18     {
19         double mid = (l + r) / 2.0;
20         
21         for (int i = 1;i <= n;i++)
22             b[i] = a[i] - mid;
23         for (int i = 1;i <= n;i++)
24             sum[i] = (sum[i - 1] + b[i]); 
25         ans = -10000000000;
26         minn = 10000000000;
27         for (int i = L;i <= n;i++)
28         {
29             minn = min(minn,sum[i - L]);
30             ans = max(ans,sum[i] - minn);
31         }
32         //new version
33         
34         for (int i = L;i <= n;i++)
35         {
36             for (int j = 1;j <= i - L;j++)
37                 ans = min(ans,(sum[i] - sum[j - 1]) / (i - j + 1));
38         }
39         if (ans >= 0)
40             l = mid;
41         else
42             r = mid;
43     }
44     printf("%d
",(int)(r * 1000));
45     return 0;
46 }
    View Code

    1435

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 const double eps = 0.000000001;
 9 int T,n;
10 double a[11000],b[11000],c[11000];
11 double f(double x)
12 {
13     double res = -10000000000.0;
14     for (int i = 1;i <= n;i++)
15         res = max(res,a[i] * x * x + b[i] * x + c[i]);
16     return res;
17 }
18 int main()
19 {
20     for (scanf("%d",&T);T;T--)
21     {
22         scanf("%d",&n);
23         for (int i = 1;i <= n;i++)
24             scanf("%lf%lf%lf",&a[i],&b[i],&c[i]);
25         double l = 0.0,r = 1000.0,lmid,rmid;
26         while (r - l > eps)
27         {
28             lmid = l + (r - l) / 3.0;
29             rmid = r - (r - l) / 3.0;
30             if (f(lmid) > f(rmid))
31                 l = lmid;
32             else
33                 r = rmid;        
34         }
35         printf("%.4lf
",f(l));
36     }
37     return 0;
38 }
    View Code

    1440

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 int n,m,ans,a[20];
 9 void dfs(int k)
10 {
11     if (n == 0)
12         return;
13     if (k == m)
14     {
15         if (n >= a[k - 1])
16         {
17             ans++;
18             return;
19         }
20     }
21     for (int i = a[k - 1];i <= n / (m - k + 1);i++)
22     {
23         a[k] = i;
24         n -= i;
25         dfs(k + 1);
26         n += i;
27     }
28 }
29 int main()
30 {
31     scanf("%d%d",&n,&m);
32     a[0] = 1;
33     dfs(1); 
34     printf("%d
",ans);
35     return 0;
36 }
    View Code

    1441

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 int n,m,res = 200000000;
 9 void dfs(int st,int v,int s,int r,int h)
10 {
11     if (st == m + 1)
12     {
13         if(v == n)
14             res = min(res,s);
15         return;
16     }
17     if (v + (r - 1) * (r - 1) * (h - 1) * (m - st + 1) < n)
18         return;
19     if (v + 1 * 1 * 1 * (m - st + 1) > n)
20         return;
21     if ((n - v) / r * 2 + s >= res)
22         return;
23     for (int i = r - 1;i >= m - st + 1;i--)
24         for (int j = h - 1;j >= m - st + 1;j--)
25         {
26             int ns = s + 2 * i * j;
27             int nv = v + i * i * j;
28             if (ns < res &&  nv <= n)
29                 dfs(st + 1,nv,ns,i,j);
30         }
31 }
32 int main()
33 {
34     scanf("%d%d",&n,&m);
35     for (int i = m;i * i * m <= n;i++)
36     {
37         for (int j = m;j * i * i <= n;j++)
38         {
39             int ns = 2 * i * j + i * i;
40             int nv = i * i * j;
41             if (ns < res)
42                 dfs(2,nv,ns,i,j);
43         }
44     }
45     printf("%d
",res);
46     return 0;
47 }
    View Code

    1442

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 int n,cnt,a[70],nxt[70],minx,sum,len;
 5 bool vis[70],suc;
 6 void dfs(int k,int lst,int res)
 7 {
 8     if (res == 0)
 9     {
10         if (k == sum / len)
11         {
12             suc = true;
13             return;
14         }
15         //k != m
16         int i;
17         for (i = 1;i <= cnt;i++)
18             if (vis[i] == false)
19                 break;
20         vis[i] = true;
21         dfs(k + 1,i,len - a[i]);
22         vis[i] = false;
23         if (suc)
24             return;
25     }
26     //res != 0
27     int l = lst + 1;
28     while (a[l] > res)
29         l++;
30     for (int i = l;i <= cnt;i++)
31     {
32         if (vis[i] == false)
33         {
34             vis[i] = true;
35             dfs(k,i,res - a[i]);
36             vis[i] = false;
37             if (suc)
38                 return;
39             i = nxt[i]; 
40         }
41     }
42     return;
43 }
44 bool cmp(int a,int b)
45 {
46     return a > b;
47 }
48 int main()
49 {
50     scanf("%d",&n);
51     int td;
52     for (int i = 1;i <= n;i++)
53     {
54         scanf("%d",&td);
55         if (td <= 50)
56         {
57             a[++cnt] = td;
58             minx = max(minx,a[cnt]);
59             sum += a[cnt];
60         }
61     }
62     sort(a + 1,a + n + 1,cmp); 
63     nxt[cnt] = cnt;
64     for (int i = cnt - 1;i >= 1;i--)
65     {
66         if (a[i] == a[i + 1])
67             nxt[i] = nxt[i + 1];
68         else
69             nxt[i] = i;
70     }
71     
72     for (len = minx;len <= sum / 2;len++)
73     {
74         if (sum % len == 0)
75         {
76             suc = false;
77             vis[1] = true;
78             dfs(1,1,len - a[1]);
79             vis[1] = false;
80             if (suc)
81             {
82                 printf("%d
",len);
83                 return 0;
84             }
85         }
86     }
87     printf("%d
",sum);
88     return 0;
89 }
    View Code

    1443(poj2248)

     1 bool dfs(int x,int lst)
 2 {//把a[0]到a[dep-1] 
 3     if (x == dep)
 4     {
 5         if (a[x - 1] == n)
 6             return true;
 7         return false;        
 8     }
 9     for (int i = 0;i <= x - 1;i++)
10         for (int j = i;j <= x - 1;j++)
11         {
12             if (a[i] + a[j] > n)
13                 break;
14             if (a[i] + a[j] > lst)
15             {
16                 a[x] = a[i] + a[j];
17                 if (dfs(x + 1,a[x]))
18                     return true;
19             }
20         }
21     return false;
22 }
23 
24 int main()
25 {
26     a[0] = 1;
27     while (scanf("%d",&n) && n)
28     {
29         for (int i = 1;;i++)
30         {
31             dep = i;
32             if (dfs(1,1))
33             {
34                 for (int j = 0;j <= i - 1;j++)
35                     printf("%d ",a[j]);
36                 break;
37             }
38         }
39     }
40 }
    View Code

    1443

     1 #include <cstdio>
 2 using namespace std;
 3 int minn,n,a[1000],ans[1000];
 4 void dfs(int x)
 5 {
 6     if (x - 1> minn)
 7         return;
 8     if (a[x - 1] > n)
 9         return;
10     if (a[x - 1] == n)
11     {
12         if (x - 1 >= minn)
13             return;
14         minn = x - 1;
15         for (int i = 1;i < x;i++)
16         ans[i] = a[i];
17         return;
18     }
19     for (int j = x - 1;j >= 1;j--)
20     {
21         if (a[x - 1] + a[j] <= n)
22         {
23             a[x] = a[x - 1] + a[j];
24             dfs(x + 1);
25             a[x] = 0;
26         }
27     }
28     
29 }
30 int main()
31 {
32     while (scanf("%d",&n) > 0 && n)
33     {
34         a[1] = 1;
35         minn = 10000000;
36         dfs(2);
37         for (int i = 1;i <= minn;i++)
38             printf("%d ",ans[i]);
39         printf("
");
40     }
41 }
    View Code

    1444

     1 #include <cstdio>
 2 #include <algorithm>
 3 #include <cstring> 
 4 using namespace std;
 5 typedef long long ll;
 6 const int MAXN = 110000;
 7 ll f[MAXN],ans[MAXN],cnt,a,b;
 8 bool suc;
 9 ll gcd(ll x,ll y)
10 {
11     if (y == 0)
12         return x;
13     return gcd(y,x % y);
14 }
15 void dfs(ll mol,ll den,ll st,ll dep)
16 {
17     if (dep == cnt - 1)
18     {
19         if (mol != 1)
20         {
21             return; 
22         } 
23         if (den < st)
24         {
25             return; 
26         }
27         f[dep + 1] = den;
28         if (suc == false)
29         {
30             for (int i = 1;i <= cnt;i++)
31                 ans[i] = f[i];
32             suc = true;
33         }else
34         {
35             if (f[cnt] < ans[cnt])
36             {
37                 for (int i = 1;i <= cnt;i++)
38                     ans[i] = f[i];
39             }
40         }
41         return;
42     }
43     ll sta = max(st,den / mol);
44     for (ll i = sta;;i++)
45     {
46         if (mol * i - den < 0)
47             continue;
48         if ((cnt - dep + 1) * den <= mol * i)
49             break;
50         ll m = mol * i - den;
51         ll de = den * i;
52         ll d = gcd(m,de);
53         f[dep + 1] = i;
54         dfs(m / d,de / d,i + 1,dep + 1);
55     }
56 }
57 int main()
58 {
59     scanf("%lld%lld",&a,&b);
60     for (cnt = 1;;cnt++)
61     {
62         memset(f,0,sizeof(f));
63         suc = false;
64         dfs(a,b,b / a + 1,0);
65         if (suc)
66         {
67             for (int i = 1;i <= cnt;i++)
68                 printf("%lld ",ans[i]);
69             return 0;
70         }
71     }
72 }
    View Code

    1448

      1 #include <cstdio>
  2 #include <cstring>
  3 #include <cmath>
  4 #include <algorithm>
  5 #include <vector>
  6 #include <queue>
  7 using namespace std;
  8 int qx[600000],qy[600000],dis[510][510],li,ri,T,r,c; 
  9 char mp[510][510];
 10 const int mx[] = {-1,-1,1,1};
 11 const int my[] = {-1,1,-1,1};
 12 void ladd(int x,int y)
 13 {
 14     if (li == ri)
 15     {
 16         qx[ri] = x;
 17         qy[ri] = y;
 18         ri++;
 19     }else
 20     {
 21         li--;
 22         qx[li] = x;
 23         qy[li] = y; 
 24     }
 25 }
 26 void radd(int x,int y)
 27 {
 28     qx[ri] = x;
 29     qy[ri] = y;
 30     ri++;
 31 }
 32 int main()
 33 {
 34     for (scanf("%d",&T);T;T--)
 35     {
 36         scanf("%d%d",&r,&c);
 37         for (int i = 1;i <= r;i++)
 38             scanf("%s",mp[i] + 1);
 39         memset(dis,0x1f,sizeof(dis));
 40         dis[1][1] = 0;
 41         li = ri = 300000; 
 42         qx[ri] = 1;
 43         qy[ri] = 1;
 44         ri++;
 45         while (li != ri)
 46         {
 47             int nx = qx[li],ny = qy[li];
 48             ++li;
 49             for (int i = 0;i <= 3;i++)
 50             {
 51                 int xx = nx + mx[i];
 52                 int yy = ny + my[i];
 53                 if (xx <= 0 || xx >= r + 2 || yy <= 0 || yy >= c + 2)
 54                     continue;
 55                 if (i == 0)
 56                 {
 57                     if (mp[nx - 1][ny - 1] == '\')
 58                     {
 59                         if (dis[xx][yy] <= dis[nx][ny])
 60                             continue;
 61                         ladd(xx,yy);
 62                         dis[xx][yy] = dis[nx][ny];
 63                     }
 64                     else
 65                     {
 66                         if (dis[xx][yy] <= dis[nx][ny] + 1)
 67                             continue;
 68                         radd(xx,yy);
 69                         dis[xx][yy] = dis[nx][ny] + 1;
 70                     }
 71                 }else if (i == 1)
 72                 {
 73                     if (mp[nx - 1][ny] == '/')
 74                     {
 75                         if (dis[xx][yy] <= dis[nx][ny])
 76                             continue;
 77                         ladd(xx,yy);
 78                         dis[xx][yy] = dis[nx][ny];
 79                     }
 80                     else
 81                     {
 82                         if (dis[xx][yy] <= dis[nx][ny] + 1)
 83                             continue;
 84                         radd(xx,yy);
 85                         dis[xx][yy] = dis[nx][ny] + 1;
 86                     }
 87                 }else if (i == 2)
 88                 {
 89                     if (mp[nx][ny - 1] == '/')
 90                     {
 91                         if (dis[xx][yy] <= dis[nx][ny])
 92                             continue;
 93                         ladd(xx,yy);
 94                         dis[xx][yy] = dis[nx][ny];
 95                     }
 96                     else
 97                     {
 98                         if (dis[xx][yy] <= dis[nx][ny] + 1)
 99                             continue;
100                         radd(xx,yy);
101                         dis[xx][yy] = dis[nx][ny] + 1;
102                     }
103                 }else if (i == 3)
104                 {
105                     if (mp[nx][ny] == '\')
106                     {
107                         if (dis[xx][yy] <= dis[nx][ny])
108                             continue;
109                         ladd(xx,yy);
110                         dis[xx][yy] = dis[nx][ny];
111                     }
112                     else
113                     {
114                         if (dis[xx][yy] <= dis[nx][ny] + 1)
115                             continue;
116                         radd(xx,yy);
117                         dis[xx][yy] = dis[nx][ny] + 1;
118                     }
119                 }
120             }
121         }
122         if (dis[r + 1][c + 1] != dis[0][0]) 
123             printf("%d
",dis[r + 1][c + 1]);
124         else
125             printf("NO SOLUTION
");
126     }
127     return 0;
128 }
    View Code

     1449

      1 #include <cstdio>
  2 #include <cstring>
  3 #include <cmath>
  4 #include <algorithm>
  5 #include <vector>
  6 #include <queue>
  7 using namespace std;
  8 struct dat
  9 {
 10     int mtx[3][5];
 11     friend bool operator == (dat x,dat y)
 12     {
 13         for (int i = 1;i <= 4;i++)
 14             if (x.mtx[1][i] != y.mtx[1][i] || x.mtx[2][i] != y.mtx[2][i])
 15                 return false;
 16         return true;
 17     }
 18 };
 19 int dis[51000],vis[51000];
 20 dat sta,fnsh,pre[51000];
 21 char wrk[51000];
 22 int calc(int x)
 23 {
 24     int res = 1;
 25     for (int i = 2;i <= x;i++)
 26         res *= i;
 27     return res; 
 28 }
 29 int get(dat x)
 30 {
 31     int t[10],res = 0,sum = 0;
 32     for (int i = 1;i <= 4;i++)
 33         t[i] = x.mtx[1][i];
 34     for (int i = 4;i >= 1;i--)
 35         t[8 - i + 1] = x.mtx[2][i];
 36     //康托展开的部分
 37     for (int i = 1;i <= 8;i++)
 38     {
 39         sum = 0;
 40         for (int j = i + 1;j <= 8;j++)
 41             if (t[j] < t[i])
 42                 sum++;
 43         res += sum * calc(8 - i);
 44     }
 45     return res;
 46 }
 47 dat change(dat x,int opt)
 48 {
 49     dat res;
 50     if (opt == 0)
 51     {
 52         for (int i = 1;i <= 4;i++)
 53         {
 54             res.mtx[1][i] = x.mtx[2][i];
 55             res.mtx[2][i] = x.mtx[1][i];
 56         }
 57         return res;
 58     }
 59     if (opt == 1)
 60     {
 61         res.mtx[1][1] = x.mtx[1][4];
 62         res.mtx[2][1] = x.mtx[2][4];
 63         for (int i = 2;i <= 4;i++)
 64         {
 65             res.mtx[1][i] = x.mtx[1][i - 1];
 66             res.mtx[2][i] = x.mtx[2][i - 1];
 67         }
 68         return res;
 69     }
 70     res.mtx[1][1] = x.mtx[1][1];
 71     res.mtx[1][2] = x.mtx[2][2];
 72     res.mtx[1][3] = x.mtx[1][2];
 73     res.mtx[1][4] = x.mtx[1][4];
 74     res.mtx[2][1] = x.mtx[2][1];
 75     res.mtx[2][2] = x.mtx[2][3];
 76     res.mtx[2][3] = x.mtx[1][3];
 77     res.mtx[2][4] = x.mtx[2][4];
 78     return res;
 79 }
 80 void print(dat x)
 81 {
 82     if (x == sta)
 83         return;
 84     print(pre[get(x)]);
 85     printf("%c",wrk[get(x)]);
 86     //因为题目要求每行输出60个 
 87 }
 88 void bfs()
 89 {
 90     memset(dis,0x1f,sizeof(dis)); 
 91     queue <dat> que;
 92     que.push(sta);
 93     dis[get(sta)] = 0;
 94     while (!que.empty())
 95     {
 96         dat now = que.front();
 97         que.pop();
 98         if (now == fnsh)
 99         {
100             printf("%d
",dis[get(now)]);
101             print(fnsh);
102             printf("
");
103             break;
104         }
105         for (int i = 0;i <= 2;i++)
106         {
107             dat tmp = change(now,i);
108             if (vis[get(tmp)])
109                 continue;
110             vis[get(tmp)] = true;
111             que.push(tmp);
112             dis[get(tmp)] = dis[get(now)] + 1;
113             pre[get(tmp)] = now;
114             wrk[get(tmp)] = 'A' + i;
115         }
116     }
117 }
118 int main()
119 {
120     for (int i = 1;i <= 4;i++)
121         sta.mtx[1][i] = i;
122     for (int i = 4;i >= 1;i--)
123         sta.mtx[2][i] = 8 - i + 1;
124     for (int i = 1;i <= 4;i++)
125         scanf("%d",&fnsh.mtx[1][i]);
126     for (int i = 4;i >= 1;i--)
127         scanf("%d",&fnsh.mtx[2][i]);
128     bfs(); 
129     return 0;
130 }
    View Code

     1450

     1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <algorithm>
 5 #include <vector>
 6 #include <queue>
 7 using namespace std;
 8 queue <int> quex[2],quey[2];
 9 const int mx[] = {-2,-2,-1,-1,1,1,2,2};
10 const int my[] = {-1,1,-2,2,-2,2,-1,1};
11 int n,ans,sx,sy,fx,fy,T;
12 bool vis[2][310][310];
13 int dis[2][310][310];
14 bool solve(int o)
15 {
16     int nx = quex[o].front();
17     quex[o].pop();
18     int ny = quey[o].front();
19     quey[o].pop();
20     for (int i = 0;i <= 7;i++)
21     {
22         int xx = nx + mx[i];
23         int yy = ny + my[i];
24         if (xx >= 0 && yy >= 0 && xx <= n - 1 && yy <= n - 1 && !vis[o][xx][yy])
25         {
26             vis[o][xx][yy] = true;
27             
28             quex[o].push(xx);
29             quey[o].push(yy);
30             dis[o][xx][yy] = dis[o][nx][ny] + 1;
31             if (vis[o ^ 1][xx][yy])
32             {
33                 ans = dis[o][xx][yy] + dis[o ^ 1][xx][yy];
34                 return true;
35             }
36         }
37     }
38     return false;
39 }
40 void bfs()
41 {
42     ans = 0;
43     memset(vis,0,sizeof(vis));
44     memset(dis,0x1f,sizeof(dis)); 
45     dis[0][sx][sy] = 0;
46     dis[1][fx][fy] = 0;
47     vis[0][sx][sy] = true;
48     vis[1][fx][fy] = true;
49     while (!quex[0].empty())
50         quex[0].pop();
51     while (!quex[1].empty())
52         quex[1].pop();
53     while (!quey[0].empty())
54         quey[0].pop();
55     while (!quey[1].empty())
56         quey[1].pop();
57     quex[0].push(sx);
58     quey[0].push(sy);
59     quex[1].push(fx);
60     quey[1].push(fy);
61     while (!quex[0].empty() && !quex[1].empty())
62     {
63         if (quex[0].size() > quex[1].size())
64         {
65             if (solve(1))
66                 return;
67         }else
68         {
69             if (solve(0))
70                 return;
71         }
72     }
73 }
74 int main()
75 {
76     for (scanf("%d",&T);T;T--)
77     {
78         scanf("%d",&n);
79         n--;
80         scanf("%d%d",&sx,&sy);
81         scanf("%d%d",&fx,&fy);
82         if (sx == fx && sy == fy)
83         { 
84             printf("0
");
85             continue; 
86         } 
87         bfs();
88         printf("%d
",ans);
89     }
90     return 0;
91 }
    View Code

     1455

    取模

     1 #include <cstdio>
 2 #include <cstring>
 3 using namespace std;
 4 typedef long long ll;
 5 const int MAXN = 1100000,b = 29,mo = 1000000007;
 6 char s1[MAXN],s2[MAXN];
 7 int ans,sum,n,m,T,bb[MAXN],h[MAXN];
 8 int main()
 9 {
10     bb[0] = 1;
11     for (int i = 1;i <= 1000000;i++)
12         bb[i] = (ll)bb[i - 1] * b % mo;
13     for (scanf("%d",&T);T;T--)
14     {
15         ans = 0;
16         scanf("%s%s",s1 + 1,s2 + 1);
17         n = strlen(s1 + 1);
18         m = strlen(s2 + 1);
19         h[0] = 0;
20         for (int i = 1;i <= m;i++)
21             h[i] = ((ll)h[i - 1] * b + (s2[i] - 'A' + 1)) % mo;
22         sum = 0;
23         for (int i = 1;i <= n;i++)
24             sum = ((ll)sum * b + (s1[i] - 'A' + 1)) % mo;
25         for (int i = 0;i <= m - n;i++)
26         {//从[1,n] [2,n+1] .....和是s1是否相等 
27             ll tmp = h[i + n] - (ll)h[i] * bb[n] % mo;
28             while (tmp < 0)
29                 tmp += mo;
30             tmp %= mo;
31             if (sum == tmp)
32                 ans++; 
33         }
34         printf("%d
",ans);
35     }
36     return 0;
37 }
    View Code

    自然溢出

     1 #include <cstdio>
 2 #include <cstring>
 3 using namespace std;
 4 typedef unsigned long long ull;
 5 const int MAXN = 1100000,b = 29;
 6 char s1[MAXN],s2[MAXN];
 7 ull ans,sum,n,m,T,bb[MAXN],h[MAXN];
 8 int main()
 9 {
10     bb[0] = 1;
11     for (int i = 1;i <= 1000000;i++)
12         bb[i] = bb[i - 1] * b;
13     for (scanf("%d",&T);T;T--)
14     {
15         ans = 0;
16         scanf("%s%s",s1 + 1,s2 + 1);
17         n = strlen(s1 + 1);
18         m = strlen(s2 + 1);
19         h[0] = 0;
20         for (int i = 1;i <= m;i++)
21             h[i] = h[i - 1] * b + s2[i] - 'A' + 1;
22         sum = 0;
23         for (int i = 1;i <= n;i++)
24             sum = sum * b + s1[i] - 'A' + 1;
25         for (int i = 0;i <= m - n;i++)
26         {//从[1,n] [2,n+1] .....和是s1是否相等 
27             if (sum == h[i + n] - h[i] * bb[n])
28                 ans++; 
29         }
30         printf("%d
",ans);
31     }
32     return 0;
33 }
    View Code

    1456

     1 #include <map>
 2 #include <iostream>
 3 #include <string>
 4 #include <cstdio>
 5 using namespace std;
 6 int m;
 7 map <string,bool> mp;
 8 int main()
 9 {
10     scanf("%d",&m);
11     for(int i = 1;i <= m;i++)
12     {
13         string op,str;
14         char c;
15         cin >> op;
16         c = getchar();
17         getline(cin,str);
18         if (op == "find")
19         {
20             if (mp[str] == true)
21                 printf("yes
");
22             else
23                 printf("no
");
24         }else
25         {
26             mp[str] = true;
27         }
28     }
29     return 0;
30 }
    View Code

     1471

     1 #include <cstdio>
 2 #include <algorithm>
 3 #include <iostream> 
 4 using namespace std;
 5 int tot,trie[110000][12],T,n;
 6 string str[11000];
 7 bool insert(string s)
 8 {
 9     int p = 1;
10     bool suc = true;
11     for (int i = 0;i < s.length();i++)
12     {
13         if (trie[p][s[i] - '0'])
14             p = trie[p][s[i] - '0'];
15         else
16         {
17             trie[p][s[i] - '0'] = ++tot;
18             p = tot;
19             suc = false;
20         }
21     }
22     return suc;
23 }
24 bool cmp(string a,string b)
25 {
26     return a.length() > b.length();
27 }
28 int main()
29 {
30     for (scanf("%d",&T);T;T--)
31     {
32         for (int i = 1;i <= tot;i++)
33             for (int j = 0;j <= 9;j++)
34                 trie[i][j] = 0;
35         tot = 1;
36         bool suc = false;
37         scanf("%d",&n);
38         for (int i = 1;i <= n;i++)
39         {
40             cin >> str[i];
41         }
42         sort(str + 1,str + n + 1,cmp);
43         for (int i = 1;i <= n;i++)
44             if (insert(str[i]))
45             {
46                 suc = true;
47                 break;
48             }
49         if (suc == false)
50             printf("YES
");
51         else
52             printf("NO
");
53     }
54     return 0;
55 }
    View Code

     1472

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 const int MAXN = 110000;
 5 int tot = 1,n,trie[MAXN * 32][2],a[MAXN];
 6 void insert(int x)
 7 {
 8     int u = 1;
 9     for (int i = 31;i >= 0;i--)
10     {
11         int t = (x >> i) & 1;
12         if (trie[u][t] == 0)
13         {
14             trie[u][t] = ++tot;
15             u = trie[u][t];
16         }else
17             u = trie[u][t]; 
18     }
19 }
20 int find(int x)
21 {
22     int u = 1,res = 0;
23     for (int i = 31;i >= 0;i--)
24     {
25         int t = (x >> i) & 1;
26         if (trie[u][t ^ 1])
27         {
28             u = trie[u][t ^ 1];
29             res = (res << 1) | 1;
30         }else
31         {
32             u = trie[u][t];
33             res = (res << 1);
34         }
35     }
36     return res;
37 }
38 int main()
39 {
40     scanf("%d",&n);
41     for (int i = 1;i <= n;i++)
42     {
43         scanf("%d",&a[i]);
44         insert(a[i]);
45     }
46     int res = 0;
47     for (int i = 1;i <= n;i++)
48     {
49         res = max(res,find(a[i]));
50     }
51     printf("%d
",res);
52     return 0;
53 }
    View Code

     1473

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 const int MAXN = 410000;
 5 int tot = 1,n,trie[MAXN * 32][2],a[MAXN],m1[MAXN],m2[MAXN];
 6 void insert(int x)
 7 {
 8     int u = 1;
 9     for (int i = 31;i >= 0;i--)
10     {
11         int t = (x >> i) & 1;
12         if (trie[u][t] == 0)
13         {
14             trie[u][t] = ++tot;
15             u = trie[u][t];
16         }else
17             u = trie[u][t]; 
18     }
19 }
20 int find(int x)
21 {
22     int u = 1,res = 0;
23     for (int i = 31;i >= 0;i--)
24     {
25         int t = (x >> i) & 1;
26         if (trie[u][t ^ 1])
27         {
28             u = trie[u][t ^ 1];
29             res = (res << 1) | 1;
30         }else
31         {
32             u = trie[u][t];
33             res = (res << 1);
34         }
35     }
36     return res;
37 }
38 int main()
39 {
40     scanf("%d",&n);
41     for (int i = 1;i <= n;i++)
42         scanf("%d",&a[i]);
43     insert(0);
44     int sum = 0;
45     for (int i = 1;i <= n;i++)
46     {
47         sum ^= a[i];
48         m1[i] = max(m1[i - 1],find(sum));
49         insert(sum);
50     }
51     
52     for (int i = 1;i <= tot;i++)
53         trie[i][0] = trie[i][1] = 0;
54     tot = 1;
55     
56     insert(0);
57     sum = 0;
58     for (int i = n;i >= 1;i--)
59     {
60         sum ^= a[i];
61         m2[i] = max(m2[i + 1],find(sum));
62         insert(sum);
63     }
64     int res = 0; 
65     for (int i = 1;i <= n - 1;i++)
66         res = max(res,m1[i] + m2[i + 1]);
67     printf("%d
",res);
68 }
    View Code

    1486(loj10064)

     1 #include <cstdio>
 2 #include <algorithm>
 3 #include <queue>
 4 #include <cstring>
 5 using namespace std;
 6 const int MAXN = 1100,MAXM = 1100000;
 7 bool inq[MAXN];
 8 int dis[MAXN],mp[MAXN][MAXN],n,m;
 9 int head[MAXN];
10 int to[MAXM],nxt[MAXM],val[MAXM];
11 int cnt;
12 void add(int x,int y,int v)
13 {
14     nxt[++cnt] = head[x];
15     to[cnt] = y;
16     val[cnt] = v;
17     head[x] = cnt;
18 }
19 void spfa(int s)
20 {
21     memset(inq,0,sizeof(inq));
22     memset(dis,0x1f,sizeof(dis));
23     queue <int> que;
24     que.push(s);
25     dis[s] = 0;
26     inq[s] = 1;
27     
28     while (!que.empty())
29     {
30         int tx = que.front();
31         que.pop();
32         inq[tx] = false;
33         for (int i = head[tx];i;i = nxt[i])
34         {
35             if (dis[to[i]] > dis[tx] + val[i])
36             {
37                 dis[to[i]] = dis[tx] + val[i];
38                 if (inq[to[i]] == false)
39                 {
40                     que.push(to[i]);
41                     inq[to[i]] = true;
42                 }
43             }
44         }
45     }
46     return;
47 }
48 
49 int main()
50 {
51     scanf("%d%d",&n,&m);
52     int tx,ty,tv;
53     memset(mp,0x1f,sizeof(mp));
54     for (int i = 1;i <= m;i++)
55     {
56         scanf("%d%d%d",&tx,&ty,&tv);
57         add(tx,ty,tv);
58         add(ty,tx,tv);
59         mp[tx][ty] = mp[ty][tx] =  tv;
60     }
61     spfa(1);
62     long long ans = 1;
63     for (int i = 2;i <= n;i++)
64     {
65         int sum = 0;
66         for (int j = 1;j <= n;j++)
67         {
68             if (dis[j] + mp[j][i] == dis[i])
69             {
70                 sum++;
71             }
72         }
73         if (sum != 0)
74         {
75             ans = ans * sum % ((1 << 31) - 1);
76         }
77     }
78     printf("%d
",ans);
79 }
    View Code

    1487(loj10065，输入格式有微小差距）

     1 #include <cstdio>
 2 #include <algorithm>
 3 #include <cmath>
 4 using namespace std;
 5 struct edg
 6 {
 7     int x,y;
 8     double dis;
 9 } vec[11000];
10 int fa[120],siz[120];
11 bool cmp(edg a,edg b)
12 {
13     return a.dis < b.dis;
14 }
15 void pre_dsu(int n)
16 {
17     for (int i = 1;i <= n;i++) 
18         fa[i] = i,siz[i] = 1;
19 }
20 int getfa(int u)
21 {
22     if (fa[u] == u) return u;
23     return fa[u] = getfa(fa[u]);
24 }
25 void merge(int u,int v)
26 {
27     int s1 = getfa(u),s2 = getfa(v);
28     if(s1 == s2) return;
29     if (siz[s1] < siz[s2])
30     {
31         fa[s1] = s2;
32         siz[s2] += siz[s1];
33     }else
34     {
35         fa[s2] = s1;
36         siz[s1] += siz[s2];
37     }
38 }
39 int cnt,sum,k,n;
40 double x[120],y[120],mp[120][120],ans;
41 int main()
42 {
43     scanf("%d%d",&n,&k);
44     pre_dsu(n);
45     for (int i = 1;i <= n;i++)
46     {
47         scanf("%lf%lf",&x[i],&y[i]);
48     }
49     for (int i = 1;i <= n;i++)
50         for (int j = 1;j <= n;j++)
51         {
52             ++cnt;
53             vec[cnt].x = i;
54             vec[cnt].y = j;
55             mp[i][j] = vec[cnt].dis = sqrt((x[i] - x[j]) * (x[i] - x[j]) + (y[i] - y[j]) * (y[i] - y[j]));
56         }
57     sort(vec + 1,vec + cnt + 1,cmp);
58     for (int i = 1;i <= cnt;i++)
59     {
60         if (getfa(vec[i].x) == getfa(vec[i].y))
61             continue;
62         merge(vec[i].x,vec[i].y);
63         ans = vec[i].dis;
64         sum++;
65         if (sum == n - k)
66             break; 
67     }
68     printf("%.2lf
",ans);
69 }
    View Code

     1496(loj10074)

     1 #include <cstdio>
 2 #include <queue>
 3 #include <cstring> 
 4 #include <iostream>
 5 using namespace std;
 6 const int MAXN = 510000,MAXM = 1010000;
 7 struct pot
 8 {
 9     int x,dis;
10     pot(int _x = 0,int _dis = 0) :x(_x),dis(_dis){}
11     friend bool operator < (pot a,pot b)
12     {
13         return a.dis > b.dis;
14     }
15 };
16 priority_queue <pot> que;
17 bool vis[MAXN];
18 int head[MAXN],dis[MAXN];
19 int to[MAXM],nxt[MAXM],val[MAXM];
20 int cnt,n,m,k;
21 void add(int x,int y,int v)
22 {
23     nxt[++cnt] = head[x];
24     to[cnt] = y;
25     val[cnt] = v;
26     head[x] = cnt;
27 }
28 int dij(int s,int mid)
29 {
30     while (!que.empty()) que.pop();
31     que.push(pot(s,0));
32     memset(dis,0x1f,sizeof(dis));
33     memset(vis,0,sizeof(vis));
34     dis[s] = 0;
35     while (!que.empty())
36     {
37         int u = que.top().x;
38         que.pop();
39         if (vis[u]) continue;
40         vis[u] = true;
41         for (int i = head[u];i;i = nxt[i])
42         {
43             int tv = 0;
44             if(val[i] > mid) tv = 1;
45             else tv = 0;
46             if (dis[to[i]] > dis[u] + tv)
47             {
48                 dis[to[i]] = dis[u] + tv;
49                 que.push(pot(to[i],dis[to[i]]));
50             }
51         }
52     }
53     return dis[n];
54 }
55 
56 int main()
57 {
58     scanf("%d%d%d",&n,&m,&k);
59     int tx,ty,tv;
60     for (int i = 1;i <= m;i++)
61     {
62         scanf("%d%d%d",&tx,&ty,&tv);
63         add(tx,ty,tv);
64         add(ty,tx,tv);
65     }
66     int l = 0,r = 1000000000;
67     while (l < r)
68     {
69         int mid = l + r >> 1;
70         if (dij(1,mid) > k)
71             l = mid + 1;
72         else
73             r = mid;
74     }
75     if (l == 1000000000)
76         printf("-1
");
77     else
78         printf("%d
",l); 
79 }
    View Code

    1505(loj10083)

     1 #include <cstdio>
 2 #include <queue>
 3 #include <cstring>
 4 using namespace std;
 5 int n,m,S,T,cnt,ans;
 6 bool inq[110][11000];
 7 int dis[110][11000];
 8 int head[110],to[1100],nxt[1100],tim[1100],val[1100];
 9 struct dat
10 {
11     int pos;
12     int val;
13     dat (int _pos = 0,int _val = 0):pos(_pos),val(_val){}
14 };
15 void add(int x,int y,int c,int t)
16 {
17     nxt[++cnt] = head[x];
18     to[cnt] = y;
19     val[cnt] = c;
20     tim[cnt] = t;
21     head[x] = cnt;
22 }
23 void spfa()
24 {
25     queue <dat> que;
26     memset(dis,0x1f,sizeof(dis));
27     que.push(dat(S,0));
28     inq[S][0] = true;
29     dis[S][0] = 0;
30     while (que.size() != 0)
31     {
32         dat x = que.front();
33         que.pop();
34         inq[x.pos][x.val] = false;
35         for (int i = head[x.pos];i;i = nxt[i])
36         {
37             int v = to[i];
38             if (x.val + val[i] > n * 100)
39                 continue;
40             if (dis[v][x.val + val[i]] > dis[x.pos][x.val] + tim[i])
41             {
42                 dis[v][x.val + val[i]] = dis[x.pos][x.val] + tim[i];
43                 if (!inq[v][x.val + val[i]])
44                 {
45                     que.push(dat(v,x.val + val[i]));
46                     inq[v][x.val + val[i]] = true;
47                 }
48             }
49         }
50     }
51 }
52 int main()
53 {
54     scanf("%d%d%d%d",&n,&m,&S,&T);
55     int ta,tb,tc,tt;
56     for (int i = 1;i <= m;i++)
57     {
58         scanf("%d%d%d%d",&ta,&tb,&tc,&tt);
59         add(ta,tb,tc,tt);
60         add(tb,ta,tc,tt); 
61     }
62     spfa();
63     int minn = dis[0][0];
64     for (int i = 0;i <= n * 100;i++)
65     {
66         if (dis[T][i] == dis[0][0] || dis[T][i] >= minn)
67             continue;
68         minn = dis[T][i];
69         ans++;
70     }
71     printf("%d
",ans);
72     return 0;
73 }
    View Code

    1526(loj10104)

     1 #include <cstdio>
 2 #include <cstring>
 3 using namespace std;
 4 char str[1100];
 5 int T,n,tot,c0,c1,S;
 6 int ind[30],outd[30],mp[30][30];
 7 bool vis[30],suc;
 8 void dfs(int u)
 9 {
10     for (int i = 1;i <= 26;i++)
11     {
12         if (mp[u][i] > 0)
13         {
14             mp[u][i] -= 1;
15             dfs(i);
16         }
17     }
18     tot++;
19 }
20 int main()
21 {
22     for (scanf("%d",&T);T;T--)
23     {
24         
25         memset(ind,0,sizeof(ind));
26         memset(outd,0,sizeof(outd));
27         memset(mp,0,sizeof(mp));
28         memset(vis,0,sizeof(vis));
29         c0 = c1 = S = 0;
30         suc = true;
31         scanf("%d",&n);
32         for (int i = 1;i <= n;i++)
33         {
34             scanf("%s",str + 1);
35             int x = str[1] - 'a' + 1;
36             int y = str[strlen(str + 1)] - 'a' + 1;
37             mp[x][y] += 1;
38             outd[x] += 1;
39             ind[y] += 1;
40             vis[x] = true;
41             vis[y] = true;
42         }
43         for (int i = 1;i <= 26;i++)
44         {
45             if (outd[i] - ind[i] == 1)
46             {
47                 S = i;
48                 c0 += 1;
49             }else if (ind[i] - outd[i] == 1)
50             {
51                 c1 += 1;
52             }else if (ind[i] == outd[i])
53             {
54                 //空着 
55             }else
56             {
57                 suc = false;
58             }
59         }
60         if (c0 == 0 && c1 == 0)
61         {
62             for (int i = 1;i <= 26;i++)
63             {
64                 if (vis[i] == true)
65                 {
66                     S = i;
67                 }
68             }
69         }else if (c0 == 1 && c1 == 1)
70         {
71             //
72         }else
73         {
74             suc = false;
75         }
76         if (suc == true)
77         {
78             tot = 0;
79             dfs(S);
80             if (tot == n + 1)
81             {
82                 printf("Ordering is possible.
");
83             }else
84             {
85                 printf("The door cannot be opened.
");
86             }
87         }else
88         {
89             printf("The door cannot be opened.
");
90         }
91     }
92 }
    View Code

    1527(loj10105)

      1 #include <cstdio>
  2 #include <cstring>
  3 #include <stack>
  4 #include <vector>
  5 using namespace std;
  6 stack <int> stk;
  7 vector <int> vec;
  8 const int MAXN = 510000;
  9 int t,n,m,cnt;
 10 int head[MAXN],to[MAXN],nxt[MAXN],ind[MAXN],outd[MAXN],d[MAXN];
 11 void del(int x,int i)
 12 {
 13     if (head[x] == i)
 14     {
 15         head[x] = nxt[i];
 16         return;
 17     }
 18     //head[x] != i
 19     int v = head[x];
 20     for (int o = head[x];o;o = nxt[o])
 21     {
 22         if (i == o)
 23         {
 24             nxt[v] = nxt[o];
 25             return;
 26         }
 27         v = o;
 28     }
 29     
 30 }
 31 void dfs1(int x)
 32 {
 33     while (head[x] != 0)
 34     {
 35         int i = head[x];
 36         del(x,i);
 37         del(to[i],i^1);
 38         dfs1(to[i]);
 39         stk.push(i);
 40     }
 41 }
 42 void dfs2(int x)
 43 {
 44     while (head[x] != 0)
 45     {
 46         int i = head[x];
 47         del(x,i);
 48         dfs2(to[i]);
 49         stk.push(i);
 50     }
 51 }
 52 void add2(int x,int y)
 53 {
 54     nxt[++cnt] = head[x];
 55     to[cnt] = y;
 56     head[x] = cnt;
 57     outd[x]++;
 58     ind[y]++;
 59 }
 60 void add1(int x,int y)
 61 {
 62     nxt[++cnt] = head[x];
 63     to[cnt] = y;
 64     head[x] = cnt;
 65     d[x]++;
 66 }
 67 int main()
 68 {
 69     scanf("%d%d%d",&t,&n,&m);
 70     if (t == 1)
 71     {
 72         cnt = 1;
 73         int ta,tb;
 74         for (int i = 1;i <= m;i++)
 75         {
 76             scanf("%d%d",&ta,&tb);
 77             add1(ta,tb);//偶数那条  和原图方向一致 
 78             add1(tb,ta); //奇数 和原图方向相反 
 79         }
 80         for (int i = 1;i <= n;i++)
 81             if (d[i] % 2 == 1)
 82             {
 83                 printf("NO
");
 84                 return 0;
 85             }
 86         for (int i = 1;i <= n;i++)
 87         {
 88             if (d[i] == 0)
 89                 continue; 
 90             //
 91             dfs1(i);
 92             if (stk.size() == m)
 93                 break;
 94             else
 95             {
 96                 printf("NO
");
 97                 return 0;    
 98             }
 99         }
100         printf("YES
");
101         while (!stk.empty())
102         {
103             printf("%d ",((stk.top() % 2) ? -((stk.top() - 1)/2) : stk.top() / 2));
104             stk.pop();
105         }
106     }else
107     {
108         cnt = 0;
109         int ta,tb;
110         for (int i = 1;i <= m;i++)
111         {
112             scanf("%d%d",&ta,&tb);
113             add2(ta,tb);
114         }
115         for (int i = 1;i <= n;i++)
116         {
117             if (ind[i] != outd[i])
118             {
119                 printf("NO
");
120                 return 0;
121             }
122         }
123         for (int i = 1;i <= n;i++)
124         {
125             if (ind[i] == 0 && outd[i] == 0)
126                 continue;
127             dfs2(i);
128             if (stk.size() == m)
129                 break;
130             else
131             {
132                 printf("NO
");
133                 return 0; 
134             }
135         }
136         printf("YES
");
137         while (!stk.empty())
138         {
139             vec.push_back(stk.top());
140             stk.pop();
141         }
142         for (int i = 0;i < vec.size();i++)
143             printf("%d ",vec[i]);
144     }
145     return 0;
146 }
    View Code

    1535

     1 #include <cstdio>
 2 using namespace std;
 3 const int MAXN = 110000;
 4 int n,m,a[MAXN],t[MAXN];
 5 int lowbit(int x)
 6 {
 7     return x & (-x);
 8 }
 9 int add(int x,int k)
10 {
11     for (int i = x;i <= n;i += lowbit(i))
12         t[i] += k; 
13 }
14 int sum(int x)
15 {
16     int ans = 0;
17     for (int i = x;i >= 1;i -= lowbit(i))
18         ans += t[i];
19     return ans;
20 }
21 int main()
22 {
23     scanf("%d%d",&n,&m);
24     for(int i = 1;i <= n;i++)
25     {
26         scanf("%d",&a[i]);
27         add(i,a[i]);
28     }
29     int tk,tl,tr;
30     for (int i = 1;i <= m;i++)
31     {
32         scanf("%d%d%d",&tk,&tl,&tr);
33         if (tk == 0)
34             printf("%d
",sum(tr) - sum(tl) + a[tl]);
35         else if (tk == 1)
36         {
37             add(tl,tr);
38             a[tl] += tr;    
39         }
40     }
41     return 0;
42 }
    View Code

    1536

     1 #include <cstdio>
 2 using namespace std;
 3 const int MAXN = 110000,maxn = 33000;
 4 int n,m,a[MAXN],t[MAXN],tot[MAXN];
 5 int lowbit(int x)
 6 {
 7     return x & (-x);
 8 }
 9 int add(int x,int k)
10 {
11     for (int i = x;i <= maxn;i += lowbit(i))
12         t[i] += k; 
13 }
14 int sum(int x)
15 {
16     int ans = 0;
17     for (int i = x;i >= 1;i -= lowbit(i))
18         ans += t[i];
19     return ans;
20 }
21 int main()
22 {
23     scanf("%d",&n);
24     int tx,ty,ans;
25     for (int i = 1;i <= n;i++)
26     { 
27         scanf("%d%d",&tx,&ty);
28         tx += 1;
29         ans = sum(tx);
30         add(tx,1);
31         tot[ans] += 1; 
32     }
33     for (int i = 0;i < n;i++)
34         printf("%d
",tot[i]);
35 }
    View Code

    1537

     1 #include <cstdio>
 2 using namespace std;
 3 int n,m;
 4 struct bit
 5 {
 6     int t[51000],n;
 7     int lowbit(int x)
 8     {
 9         return x & (-x);
10     }
11     int add(int x,int k)
12     {
13         for (int i = x;i >= 1;i -= lowbit(i))
14             t[i] += k; 
15     }
16     int sum(int x)
17     {
18         int ans = 0;
19         for (int i = x;i <= n;i += lowbit(i))
20             ans += t[i];
21         return ans;
22     }
23 } T1,T2;
24 int main()
25 {
26     scanf("%d%d",&n,&m);
27     T1.n = T2.n = n;
28     int opt,tx,ty;
29     for (int i = 1;i <= m;i++)
30     {
31         scanf("%d%d%d",&opt,&tx,&ty);
32         if(opt == 1)
33         {
34             T1.add(ty,1);
35             T2.add(tx,1);
36         }else if (opt == 2)
37         {
38             printf("%d
",T1.sum(tx) - T2.sum(ty + 1));
39         }
40     }
41     return 0;
42 }
    View Code

    1538

     1 #include <cstdio>
 2 using namespace std;
 3 int n,k,t[1100000];
 4 int lowbit(int x)
 5 {
 6     return x & (-x);
 7 }
 8 int add(int x,int k)
 9 {
10     for (int i = x;i <= n;i += lowbit(i))
11         t[i] += k; 
12 }
13 int sum(int x)
14 {
15     int ans = 0;
16     for (int i = x;i >= 1;i -= lowbit(i))
17         ans += t[i];
18     return ans;
19 }
20 int main()
21 {
22     scanf("%d%d",&n,&k);
23     char opt[10];
24     int ta,tb;
25     for (int i = 1;i <= k;i++)
26     {
27         scanf("%s",opt);
28         if (opt[0] == 'A')
29         {
30             scanf("%d",&ta);
31             printf("%d
",sum(ta));
32         }else if (opt[0] == 'B')
33         {
34             scanf("%d%d",&ta,&tb);
35             add(ta,tb);
36         }else if (opt[0] == 'C')
37         {
38             scanf("%d%d",&ta,&tb);
39             add(ta,-tb);
40         }
41     }
42     return 0;
43 }
    View Code

    1539

     1 #include <cstdio>
 2 using namespace std;
 3 int n,m,t[1100000];
 4 int lowbit(int x)
 5 {
 6     return x & (-x);
 7 }
 8 int add(int x,int k)
 9 {
10     for (int i = x;i <= n;i += lowbit(i))
11         t[i] += k; 
12 }
13 int sum(int x)
14 {
15     int ans = 0;
16     for (int i = x;i >= 1;i -= lowbit(i))
17         ans += t[i];
18     return ans;
19 }
20 int main()
21 {
22     scanf("%d%d",&n,&m);
23     n += 1;
24     int opt,tl,tr;
25     for (int i = 1;i <= m;i++)
26     {
27         scanf("%d",&opt,&tl,&tr);
28         if (opt == 1)
29         {
30             scanf("%d%d",&tl,&tr);
31             add(tl,1);
32             add(tr + 1,-1);
33         }else if (opt == 2)
34         {
35             scanf("%d",&tl);
36             printf("%d
",sum(tl) % 2);
37         }
38     }
39     return 0;
40 }
    View Code

    1541

     1 #include <cmath>
 2 #include <cstdio>
 3 #include <algorithm>
 4 using namespace std; 
 5 int n,m,t,a[110000],p[20][110000];
 6 int main()
 7 {
 8     scanf("%d%d",&n,&m);
 9     for (int i = 1;i <= n;i++)
10         scanf("%d",&a[i]);
11     for (int i = 1;i <= n;i++)
12         p[0][i] = a[i];
13     t = log2(n);
14     for (int i = 1;i <= t;i++)
15     {
16         for (int j = 1;j + (1 << i) - 1 <= n;j++)
17         {
18             p[i][j] = max(p[i - 1][j],p[i - 1][j + (1 << (i - 1))]);
19         }
20     }
21     int tl,tr,tt;
22     for (int i = 1;i <= m;i++)
23     {
24         scanf("%d%d",&tl,&tr);
25         tt = log2(tr - tl + 1);
26         printf("%d
",max(p[tt][tl],p[tt][tr - (1 << tt) + 1]));
27     }
28     return 0;
29 }
    View Code

    1547

     1 #include <cstdio>
 2 using namespace std;
 3 long long tre[410000],n,m;
 4 void add(int k,int l,int r,int x,long long ad)
 5 {
 6     if (l == r)
 7     {
 8         tre[k] += ad;
 9         return;
10     }
11     int mid = l + r >> 1;
12     if (x <= mid)
13         add(k << 1,l,mid,x,ad);
14     else
15         add(k << 1 | 1,mid + 1,r,x,ad);
16     tre[k] = tre[k << 1] + tre[k << 1 | 1]; 
17 }
18 long long query(int k,int l,int r,int x,int y)
19 {
20     if (x <= l && r <= y)
21     {
22         return tre[k];
23     }
24     int mid = l + r >> 1;
25     long long sum = 0;
26     if (x <= mid)
27         sum += query(k << 1,l,mid,x,y);
28     if (y >= mid + 1)
29         sum += query(k << 1 | 1,mid + 1,r,x,y);
30     return sum; 
31 }
32 int main()
33 {
34     scanf("%lld%lld",&n,&m);
35     long long opt,tl,tr; 
36     for (int i = 1;i <= m;i++)
37     {
38         scanf("%lld%lld%lld",&opt,&tl,&tr);
39         if (opt == 1)
40         {
41             printf("%lld
",query(1,1,n,tl,tr)); 
42         }else
43         {
44             add(1,1,n,tl,tr);
45         }
46     }
47 }
    View Code

    1548

     1 #include <cstdio>
 2 using namespace std;
 3 typedef long long ll;
 4 ll sum[5000000],lzy[5000000],vec[5000000];
 5 int n,m;
 6 void down(int k,int l,int r)
 7 {
 8     if (l == r)
 9     {
10         lzy[k] = 0;
11         return;
12     }
13     int mid = l + r >> 1;
14     lzy[k * 2] += lzy[k];
15     lzy[k * 2 + 1] += lzy[k];
16     sum[k * 2] += (mid - l + 1) * lzy[k];
17     sum[k * 2 + 1] += (r - mid) * lzy[k];
18     lzy[k] = 0;
19     return;
20 }
21 void build(int k,int l,int r)
22 {
23     if (l == r)
24     {
25         sum[k] = vec[l];
26         return;
27     }
28     int mid = l + r >> 1;
29     build(k << 1,l,mid);
30     build(k << 1 | 1,mid + 1,r);
31     sum[k] = sum[k << 1] + sum[k << 1 | 1];
32     return;
33 }
34 
35 void vec_add(int k,int l,int r,int x,int y,ll ad)
36 {
37     if (lzy[k] != 0)
38         down(k,l,r);
39     if (x <= l && r <= y)
40     {
41         lzy[k] += ad;
42         sum[k] += (r - l + 1) * ad;
43         return;
44     }
45     int mid = l + r >> 1;
46     if (x <= mid)
47         vec_add(k << 1,l,mid,x,y,ad);
48     if (y >= mid + 1)
49         vec_add(k << 1 | 1,mid + 1,r,x,y,ad);
50     sum[k] = sum[k << 1] + sum[k << 1 | 1];
51 }
52 ll vec_query(int k,int l,int r,int x,int y)
53 {
54     if (lzy[k] != 0)
55         down(k,l,r);
56     if (x <= l && r <= y)
57         return sum[k];
58     ll tot = 0;
59     int mid = l + r >> 1;
60     if (x <= mid)
61         tot += vec_query(k << 1,l,mid,x,y); 
62     if (y >= mid + 1)
63         tot += vec_query(k << 1 | 1,mid + 1,r,x,y);
64     return tot;
65 }
66 
67 int main()
68 {
69     scanf("%d%d",&n,&m);
70     for (int i = 1;i <= n;i++)
71         scanf("%lld",&vec[i]);
72     build(1,1,n);
73     int opt,tx,ty;
74     ll tv;
75     for (int i = 1;i <= m;i++)
76     {
77         scanf("%d",&opt);
78         if (opt == 1)
79         {
80             scanf("%d%d%lld",&tx,&ty,&tv);
81             vec_add(1,1,n,tx,ty,tv);
82         }else
83         {
84             scanf("%d%d",&tx,&ty);
85             printf("%lld
",vec_query(1,1,n,tx,ty));
86         }
87     }
88     return 0;
89 }
    View Code

    1549

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 typedef long long ll;
 5 ll sum[5000000],vec[5000000];
 6 int n,p,len;
 7 
 8 void vec_add(int k,int l,int r,int x,ll ad)
 9 {
10     if (l == r)
11     {
12         sum[k] = ad;
13         return;
14     }
15     int mid = l + r >> 1;
16     if (x <= mid)
17         vec_add(k << 1,l,mid,x,ad);
18     if (x >= mid + 1)
19         vec_add(k << 1 | 1,mid + 1,r,x,ad);
20     sum[k] = max(sum[k << 1],sum[k << 1 | 1]);
21 }
22 ll vec_query(int k,int l,int r,int x,int y)
23 {
24     if (x <= l && r <= y)
25         return sum[k];
26     ll tot = 0;
27     int mid = l + r >> 1;
28     if (x <= mid)
29         tot = max(tot,vec_query(k << 1,l,mid,x,y)); 
30     if (y >= mid + 1)
31         tot = max(tot,vec_query(k << 1 | 1,mid + 1,r,x,y));
32     return tot;
33 }
34 
35 int main()
36 {
37     scanf("%d%d",&n,&p);
38     char str[10];
39     int tx,last = 0;
40     for (int i = 1;i <= n;i++)
41     {
42         scanf("%s",str);
43         if (str[0] == 'A')
44         {
45             scanf("%d",&tx);
46             tx = (tx + last) % p;
47             len++;
48             vec_add(1,1,200000,len,tx);
49         }else
50         {
51             scanf("%d",&tx);
52             printf("%d
",last = vec_query(1,1,200000,len - tx + 1,len));
53         }
54     }
55     return 0;
56 }
    View Code

    1550

     1 #include <cstdio>
 2 #include <algorithm>
 3 #include <cmath>
 4 using namespace std;
 5 long long vec[410000],maxn[410000],tre[410000];
 6 int n,m;
 7 void build(int k,int l,int r)
 8 {
 9     if (l == r)
10     {
11         tre[k] = vec[l];
12         maxn[k] = vec[l];
13         return;
14     }
15     int mid = l + r >> 1;
16     build(k << 1,l,mid);
17     build(k << 1 | 1,mid + 1,r);
18     tre[k] = tre[k << 1] + tre[k << 1 | 1];
19     maxn[k] = max(maxn[k << 1],maxn[k << 1 | 1]);
20 }
21 void change(int k,int l,int r,int x,int y)
22 {
23     if (maxn[k] <= 1)
24         return;
25     if (l == r)
26     {
27         tre[k] = sqrt(tre[k]);
28         maxn[k] = sqrt(maxn[k]);
29         return;
30     }
31     int mid = l + r >> 1;
32     if (x <= mid)
33         change(k << 1,l,mid,x,y);
34     if (y >= mid + 1)
35         change(k << 1 | 1,mid + 1,r,x,y);
36     tre[k] = tre[k << 1] + tre[k << 1 | 1]; 
37     maxn[k] = max(maxn[k << 1],maxn[k << 1 | 1]);
38 }
39 long long query(int k,int l,int r,int x,int y)
40 {
41     if (x <= l && r <= y)
42     {
43         return tre[k];
44     }
45     int mid = l + r >> 1;
46     long long sum = 0;
47     if (x <= mid)
48         sum += query(k << 1,l,mid,x,y);
49     if (y >= mid + 1)
50         sum += query(k << 1 | 1,mid + 1,r,x,y);
51     return sum; 
52 }
53 int main()
54 {
55     scanf("%d",&n);
56     for (int i = 1;i <= n;i++)
57         scanf("%lld",&vec[i]); 
58     build(1,1,n);
59     scanf("%d",&m);
60     int tl,tr,opt; 
61     for (int i = 1;i <= m;i++)
62     {
63         scanf("%d%d%d",&opt,&tl,&tr);
64         if (opt == 1)
65         {
66             printf("%lld
",query(1,1,n,tl,tr)); 
67         }else
68         {
69             change(1,1,n,tl,tr);
70         }
71     }
72 }
    View Code

    1551

      1 #include <cstdio>
  2 using namespace std;
  3 typedef long long ll;
  4 int n,m;
  5 ll p;
  6 ll sum[1000000],lzy[1000000],mul[1000000],vec[1000000];
  7 void build(int k,int l,int r)
  8 {
  9     mul[k] = 1;
 10     if (l == r)
 11     {
 12         sum[k] = vec[l];
 13         return;
 14     }
 15     int mid = (l + r) / 2;
 16     build(k * 2,l,mid);
 17     build(k * 2 + 1,mid + 1,r);
 18     sum[k] = sum[k * 2] + sum[k * 2 + 1];
 19     return;
 20 }
 21 void down(int k,int l,int r)
 22 {
 23     if (l == r)
 24     {
 25         lzy[k] = 0;
 26         mul[k] = 1;
 27         return;
 28     }
 29     int mid = (l + r) / 2;
 30     if (mul[k] != 1)
 31     {
 32         sum[k * 2] = sum[k * 2] * mul[k] % p;
 33         sum[k * 2 + 1] = sum[k * 2 + 1] * mul[k] % p;
 34         mul[k * 2] = mul[k * 2] * mul[k] % p;
 35         mul[k * 2 + 1] = mul[k * 2 + 1] * mul[k] % p;
 36         lzy[k * 2] = lzy[k * 2] * mul[k] % p;
 37         lzy[k * 2 + 1] = lzy[k * 2 + 1] * mul[k] % p;
 38         mul[k] = 1;
 39     }
 40     if (lzy[k] != 0)
 41     {
 42         sum[k * 2] = (sum[k * 2] + lzy[k] * (mid - l + 1)) % p;
 43         sum[k * 2 + 1] = (sum[k * 2 + 1] + lzy[k] * (r - mid)) % p;
 44         lzy[k * 2] = (lzy[k * 2] + lzy[k]) % p;
 45         lzy[k * 2 + 1] = (lzy[k * 2 + 1] + lzy[k]) % p;
 46         lzy[k] = 0;
 47     }
 48     return;
 49 }
 50 void vec_add(int k,int l,int r,int x,int y,ll ad)
 51 {
 52     if (lzy[k] != 0 || mul[k] != 1)
 53         down(k,l,r);
 54     if (x <= l && r <= y)
 55     {
 56         lzy[k] = (lzy[k] + ad) % p;
 57         sum[k] = (sum[k] + ad * (r - l + 1)) % p;
 58         return; 
 59     }
 60     int mid = (l + r) / 2;
 61     if (x <= mid)
 62         vec_add(k * 2,l,mid,x,y,ad);
 63     if (y >= mid + 1)
 64         vec_add(k * 2 + 1,mid + 1,r,x,y,ad);
 65     sum[k] = (sum[k * 2] + sum[k * 2 + 1]) % p;
 66     return;
 67 }
 68 void vec_mul(int k,int l,int r,int x,int y,ll mu)
 69 {
 70     if (lzy[k] != 0 || mul[k] != 1)
 71         down(k,l,r);
 72     if (x <= l && r <= y)
 73     {
 74         mul[k] = mul[k] * mu % p;
 75         lzy[k] = lzy[k] * mu % p;
 76         sum[k] = sum[k] * mu % p;
 77         return;
 78     }
 79     int mid = (l + r) / 2;
 80     if (x <= mid)
 81         vec_mul(k * 2,l,mid,x,y,mu);
 82     if (y >= mid + 1)
 83         vec_mul(k * 2 + 1,mid + 1,r,x,y,mu);
 84     sum[k] = (sum[k * 2] + sum[k * 2 + 1]) % p;
 85 }
 86 ll vec_query(int k,int l,int r,int x,int y)
 87 {
 88     if (lzy[k] != 0 || mul[k] != 1)
 89         down(k,l,r);
 90     if (x <= l && r <= y)
 91         return sum[k];
 92     int mid = (l + r) / 2;
 93     ll tot = 0;
 94     if (x <= mid)
 95         tot += vec_query(k * 2,l,mid,x,y);
 96     if (y >= mid + 1)
 97         tot += vec_query(k * 2 + 1,mid + 1,r,x,y);
 98     return tot % p;
 99 }
100 int main()
101 {
102     scanf("%d%lld",&n,&p);
103     for (int i = 1;i <= n;i++)
104         scanf("%lld",&vec[i]);
105     build(1,1,n);
106     int opt,tx,ty;
107     ll tk;
108     scanf("%d",&m);
109     for (int i = 1;i <= m;i++)
110     {
111         scanf("%d",&opt);
112         if (opt == 1)
113         {
114             scanf("%d%d%lld",&tx,&ty,&tk);
115             vec_mul(1,1,n,tx,ty,tk);
116         }else if (opt == 2)
117         {
118             scanf("%d%d%lld",&tx,&ty,&tk);
119             vec_add(1,1,n,tx,ty,tk);
120         }else if (opt == 3)
121         {
122             scanf("%d%d",&tx,&ty);
123             printf("%lld
",vec_query(1,1,n,tx,ty));
124         }
125     }
126     return 0;
127 }
    View Code

    1552

     1 #include <cstdio>
 2 #include <cmath>
 3 #include <algorithm>
 4 using namespace std;
 5 const int MAXN = 1100000;
 6 int t,n,m,cnt;
 7 int head[MAXN],to[2 * MAXN],nxt[2 * MAXN],p[MAXN][20],dep[MAXN];
 8 void add(int x,int y)
 9 {
10     nxt[++cnt] = head[x];
11     to[cnt] = y;
12     head[x] = cnt;
13 }
14 void dfs(int x)
15 {
16     for (int i = head[x];i;i = nxt[i])
17     {
18         if (to[i] == p[x][0])
19             continue;
20         dep[to[i]] = dep[x] + 1;
21         p[to[i]][0] = x;
22         dfs(to[i]);
23     }
24 }
25 int lca(int x,int y)
26 {
27     if (dep[x] < dep[y])
28         swap(x,y);
29     for (int i = t;i >= 0;i--)
30         if (dep[p[x][i]] >= dep[y])
31             x = p[x][i];
32     if (x == y)
33         return x;
34     for (int i = t;i >= 0;i--)
35         if (p[x][i] != p[y][i])
36         {
37             x = p[x][i];
38             y = p[y][i];
39         }
40     return p[x][0];
41 }
42 int main()
43 {
44     scanf("%d",&n);
45     t = log2(n); 
46     int tx,ty;
47     for (int i = 1;i <= n - 1;i++)
48     {
49         scanf("%d%d",&tx,&ty);
50         add(tx,ty);
51         add(ty,tx);
52     }
53     dep[1] = 1;
54     dfs(1);
55     for (int i = 1;i <= t;i++)
56         for (int j = 1;j <= n;j++)
57             p[j][i] = p[p[j][i - 1]][i - 1];
58     scanf("%d",&m);
59     for (int i = 1;i <= m;i++)
60     {
61         scanf("%d%d",&tx,&ty);
62         printf("%d
",dep[tx] + dep[ty] - 2 * dep[lca(tx,ty)]);
63     }
64 }
    View Code

    1569

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 typedef long long ll;
 5 int n;
 6 ll vec[220],sum[220],res0,res1,dp[220][220][2];
 7 ll dfs(int l,int r,int opt)
 8 {
 9     if (dp[l][r][opt] != 0 || l == r)
10         return dp[l][r][opt];
11     if (opt == 0)
12         dp[l][r][opt] = 10000000000000;
13     for (int i = l;i <= r - 1;i++)
14         if (opt == 1)
15             dp[l][r][opt] = max(dfs(l,i,opt) + dfs(i + 1,r,opt),dp[l][r][opt]);
16         else
17             dp[l][r][opt] = min(dfs(l,i,opt) + dfs(i + 1,r,opt),dp[l][r][opt]);
18     dp[l][r][opt] += sum[r] - sum[l - 1];
19     return dp[l][r][opt]; 
20 }
21 int main()
22 {
23     scanf("%d",&n);
24     for (int i = 1;i <= n;i++)
25         scanf("%lld",&vec[i]);
26     for (int i = n + 1;i <= 2 * n;i++)
27         vec[i] = vec[i - n];
28     for (int i = 1;i <= 2 * n;i++)
29         sum[i] = vec[i] + sum[i - 1];
30     res0 = 10000000000000;
31     res1 = 0;
32     for (int i = 1;i <= n + 1;i++)
33     {
34         res0 = min(res0,dfs(i,i + n - 1,0));
35         res1 = max(res1,dfs(i,i + n - 1,1));
36     }
37     printf("%lld
%lld
",res0,res1);
38     return 0;
39 }
    View Code

    1575

    #include <cstdio>
#include <algorithm>
using namespace std;
int lc[1100],rc[1100],fa[1100],val[1100][1100],f[1100][1100],n,q;
int dp(int i,int j)
{
    if (f[i][j])
        return f[i][j];
    if (j <= 0)
        return 0;
    if (lc[i] == 0 && rc[i] == 0)
        return 0;
    
    
    int ans;
    for (int k = 0;k <= j;k++)
    {
        int tl = dp(lc[i],k - 1);
        int tr = dp(rc[i],j - k - 1);
        if (k == 0)
            ans = tr + val[i][rc[i]];
        else if (k == j)
            ans = tl + val[i][lc[i]];
        else 
            ans = tl + tr + val[i][rc[i]] + val[i][lc[i]];
        f[i][j] = max(f[i][j],ans);
    }
    return f[i][j]; 
}

int main()
{
    scanf("%d%d",&n,&q);
    int ta,tb,tc;
    for (int i = 1;i <= n - 1;i++)
    {
        scanf("%d%d%d",&ta,&tb,&tc);
        if (fa[tb])
        {
            fa[ta] = tb;
            if (lc[tb] == 0)
                lc[tb] = ta;
            else
                rc[tb] = ta;
        }else
        {
            fa[tb] = ta;
            if (lc[ta] == 0)
                lc[ta] = tb;
            else
                rc[ta] = tb;
        }
        val[ta][tb] = tc;
        val[tb][ta] = tc;
    }
    printf("%d
",dp(1,q));
}
    View Code

    1577

    #include <cstdio>
#include <algorithm> 
using namespace std;
const int MAXN = 510000;
int d[MAXN],ans,cnt,n,sum[MAXN];
int head[MAXN],to[MAXN * 2],nxt[MAXN * 2],val[MAXN * 2];
bool vis[MAXN];
void add(int x,int y,int v)
{
    nxt[++cnt] = head[x];
    to[cnt] = y;
    head[x] = cnt;
    val[cnt] = v;
}
void dp(int x)
{
    vis[x] = true;
    for (int i = head[x];i;i = nxt[i])
    {
        if (vis[to[i]])
            continue;
        int y = to[i],z = val[i];
        dp(y);
        ans = max(ans,d[x] + d[y] + z);
        d[x] = max(d[x],d[y] + z);
    }
}
int main()
{
    scanf("%d",&n);
    for (int i = 1;i <= n;i++)
        for (int j = 2;j <= n / i;j++)
            sum[i * j] += i;
    for (int i = 2;i <= n;i++)
    {
        if (sum[i] >= i)
            continue;
        add(i,sum[i],1);
        add(sum[i],i,1);
    }
    dp(1);
    printf("%d
",ans);
}
    View Code

    1578

    #include <cstdio>
#include <vector>
using namespace std;
const int MAXN = 2100;
int n,f[MAXN][2];
vector <int> edg[MAXN]; 
void dfs(int x,int fa)
{
    f[x][0] = 0;
    f[x][1] = 1;
    for (int i = 0;i < edg[x].size();i++)
    {
        if (edg[x][i] == fa)
            continue;
        dfs(edg[x][i],x);
        f[x][1] += min(f[edg[x][i]][0],f[edg[x][i]][1]);
        f[x][0] += f[edg[x][i]][1];
    }
    return;
}
int main()
{
    scanf("%d",&n);
    for (int i = 0;i < n;i++)
    {
        int k,tu,tv;
        scanf("%d%d",&k,&tu);
        for (int j = 0;j < tu;j++)
        {
            scanf("%d",&tv);
            edg[k].push_back(tv);
            edg[tv].push_back(k);
        }
    }
    dfs(0,-1);
    printf("%d
",min(f[0][0],f[0][1]));
    return 0;
}
    View Code

    1579

    #include <cstdio>
#include <algorithm>
using namespace std;
const int MAXN = 2100;
int n,w[MAXN],head[MAXN],cnt,f[MAXN][3],to[MAXN * 2],nxt[MAXN * 2];
void add(int x,int y)
{
    nxt[++cnt] = head[x];
    to[cnt] = y;
    head[x] = cnt;
}
void dfs(int x,int fa)
{
    f[x][0] = w[x];
    int minn = 100000000;
    for (int i = head[x];i;i = nxt[i])
    {
        if (to[i] == fa)
            continue;
        dfs(to[i],x);
        f[x][0] += min(f[to[i]][0],min(f[to[i]][1],f[to[i]][2]));
        f[x][1] += min(f[to[i]][0],f[to[i]][1]);
        minn = min(minn,f[to[i]][0] - min(f[to[i]][0],f[to[i]][1]));
        f[x][2] += f[to[i]][1]; 
    }
    f[x][1] += minn;
}
int main()
{
    scanf("%d",&n);
    for (int i = 1;i <= n;i++)
    {
        int tx,tk,ty;
        scanf("%d",&tx);
        scanf("%d",&w[tx]);
        scanf("%d",&tk);
        for (int j = 1;j <= tk;j++)
        {
            scanf("%d",&ty);
            add(tx,ty);
            add(ty,tx);
        }
    }
    dfs(1,-1);
    printf("%d
",min(f[1][0],f[1][1]));
}
    View Code

    1592

     1 #include <cstdio>
 2 using namespace std;
 3 typedef long long ll;
 4 ll n,K,sum,ans,num[310],sta[310],f[30][310][110];
 5 void pre()
 6 {
 7     for (int i = 0;i <= (1 << n) - 1;i++)
 8     {
 9         if (i & (i << 1)) 
10             continue;
11         sta[++sum] = i;
12         int cnt = 0;
13         for (int j = 0;j < n;j++)
14             if ((1 << j) & i)
15                 cnt++;
16         num[sum] = cnt;
17     }    
18 }
19 bool war(int x,int y)
20 {
21     if (sta[x] & sta[y])
22         return true;
23     if (sta[x] & (sta[y] << 1))
24         return true;
25     if (sta[x] & (sta[y] >> 1))
26         return true;
27     return false;
28 }
29 int main()
30 {
31     scanf("%d%d",&n,&K);
32     pre();
33     for (int i = 1;i <= sum;i++)
34         f[1][i][num[i]] = 1;
35     for (int i = 2;i <= n;i++)
36         for (int j = 1;j <= sum;j++)
37             for (int k = 0;k <= K;k++)
38             {
39                 if (k < num[j])
40                     continue;
41                 for (int l = 1;l <= sum;l++)
42                 {
43                     if (war(j,l) == false)
44                         f[i][j][k] += f[i - 1][l][k-num[j]];
45                 }
46             }
47     for (int i = 1;i <= sum;i++)
48         ans += f[n][i][K];
49     printf("%lld
",ans); 
50     return 0;
51 }
    View Code

     1593

     1 #include <cstdio>
 2 using namespace std;
 3 const int mo = 100000000;
 4 int m,n,cnt,vec[20][5100],dp[20][5100],ans;
 5 void count(int a,int t)
 6 {
 7     cnt = 0;
 8     for (int i = 0;i <= (1 << n) - 1;i++)
 9     {
10         if ((i & (i << 1)) || (i & (i >> 1)) || (i & t))
11             continue;
12         vec[a][++cnt] = i; 
13     }
14     vec[a][0] = cnt;
15 }
16 int main()
17 {
18     scanf("%d%d",&m,&n);
19     int t =0 ,tx;
20     for (int i = 1;i <= m;i++)
21     {
22         t = 0;
23         for (int j = 1;j <= n;j++)
24         {
25             scanf("%d",&tx);
26             t = (t << 1) + 1 - tx;
27         }
28         count(i,t); 
29     }
30     for (int i = 1;i <= vec[1][0];i++)
31         dp[1][i] = 1;
32     for (int i = 2;i <= m;i++)
33     {
34         for (int j = 1;j <= vec[i][0];j++)
35         {
36             for (int k = 1;k <= vec[i - 1][0];k++)
37             {
38                 if (vec[i][j] & vec[i - 1][k])
39                     continue;
40                 dp[i][j] += dp[i - 1][k];
41             }
42         }
43     }
44     for (int i = 1;i <= vec[m][0];i++)
45     {
46         ans += dp[m][i];
47         ans %= mo;
48     }
49     printf("%d
",ans);
50     return 0;
51 }
    View Code

    NOIO #2

    普及组

    P6473

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 int n,q;
 5 double L,v,a[210000],s[210000],t[210000];
 6 bool cmp(double x,double y)
 7 {
 8     return x > y;
 9 }
10 int main()
11 {
12     scanf("%d%lf%lf",&n,&L,&v);
13     
14     for (int i = 1;i <= n;i++)
15     {
16         scanf("%lf",&a[i]);
17         a[i] /= v;
18     }
19     sort(a + 1,a + n + 1,cmp); 
20     for (int i = 1;i <= n;i++)
21     {
22         s[i] = s[i - 1] + a[i];
23     }
24     
25     scanf("%d",&q);
26     for (int i = 1;i <= q;i++)
27     {
28         scanf("%lf",&t[i]);
29     }
30     for(int i = 1;i <= q;i++)
31     {
32         if (L / v > t[i])
33         {
34             printf("0
");
35             continue;
36         }
37         if (L / v + s[n] <= t[i] + 0.0000000001)
38         {
39             printf("-1
");
40             continue;
41         }
42         int l = 1,r = n;
43         while (l < r)
44         {
45             int mid = l + r >> 1;
46             if (L / v + s[mid] > t[i])
47             {
48                 r = mid;
49             }else
50             {
51                 l = mid + 1;
52             }
53         }
54         printf("%d
",l);
55     }
56 }
    View Code

    P6475

     1 #include <cstdio>
 2 using namespace std;
 3 typedef long long ll;
 4 const int mo = 998244353;
 5 ll m,n,x,y,ans,jc[210000],ny[210000];
 6 ll fpow(ll x,ll k)
 7 {
 8     if (k == 0)
 9         return 1;
10     ll t = fpow(x,k >> 1);
11     if (k & 1)
12         return t * t % mo * x % mo;
13     return t * t % mo;
14 }
15 ll f(ll a,ll b)
16 {
17     return jc[a+b-1] * ny[a] % mo * ny[b - 1] % mo;
18 }
19 int main()
20 {
21     scanf("%lld%lld%lld%lld",&m,&n,&x,&y);
22     jc[0] = 1;
23     ny[0] = 1;
24     for (ll i = 1;i <= n + m;i++)
25         jc[i] = jc[i - 1] * i % mo;
26     for (ll i = 1;i <= n + m;i++)
27         ny[i] = fpow(jc[i],mo - 2);
28     if (x <= n && y >= n + 1)
29     {
30         for (ll i = 1;i <= m;i++)
31             ans = (ans + f(x-1,i) * f(n-x,m-i+1)% mo * f(y-n-1,m-i+1)%mo*f(n*2-y,i)%mo) % mo;
32     }else
33     {
34         ans = f(n,m) * f(n + x -y,m) % mo;
35     }
36     printf("%lld
",ans);
37     return 0;
38 }
    View Code

    提高组

    P6476

     1 #include <cstdio>
 2 #include <algorithm>
 3 using namespace std;
 4 typedef long long ll;
 5 int T;
 6 ll p1,p2,k,G;
 7 ll gcd(ll a,ll b)
 8 {
 9     if (b == 0)
10         return a;
11     return gcd(b,a % b);
12 }
13 int main()
14 {
15     for (scanf("%d",&T);T;T--)
16     {
17         scanf("%lld%lld%lld",&p1,&p2,&k);
18         if (k == 1)
19         {
20             printf("NO
");
21             continue;
22         }
23         if (p1 > p2)
24             swap(p1,p2);
25         ll G = gcd(p1,p2);
26         p1 /= G;
27         p2 /= G;
28         if (p2 > 2 && (p2 - 2) / p1 + 1 >= k)
29             printf("NO
");
30         else
31             printf("YES
");
32     }
33     return 0;
34 }
    View Code

    P6477

     1 #include <cstdio>
 2 #include <set>
 3 using namespace std;
 4 int n,A[1100];
 5 set <int> st;
 6 long long ans;
 7 const int mo = 1000000007; 
 8 int main()
 9 {
10     scanf("%d",&n);
11     for (int i = 1;i <= n;i++)
12         scanf("%d",&A[i]);
13     for (int i = 1;i <= n;i++)//枚举左端点 
14     {
15         st.clear();
16         for (int j = i;j <= n;j++)//枚举右端点 
17         {
18             if (st.find(A[j]) == st.end())
19                 st.insert(A[j]);
20             //[i,j-1]
21             //[i,j]
22             
23             ans = (ans + st.size() * st.size()) % mo;
24         }
25     }
26     printf("%lld
",ans); 
27     return 0;
28 }
    View Code
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  • 原文地址：https://www.cnblogs.com/iat14/p/12331363.html
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