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激！GSS系列

  1 #include <cstdio>
  2 const int sizeOfNumber=50005;
  3 const int sizeOfSeg=200002;
  4 
  5 inline int max(int, int);
  6 inline int getint();
  7 inline void putint(int);
  8 
  9 struct node
 10 {
 11     int lmax, rmax, smax, ssum;
 12     inline node(int=0);
 13 };
 14 inline node merge(node, node);
 15 
 16 struct seg
 17 {
 18     node data;
 19     seg * l, * r;
 20     inline void maintain();
 21 };
 22 seg memory[sizeOfSeg], * port=memory;
 23 inline seg * newseg();
 24 seg * build(int, int);
 25 node query(seg * , int, int, int, int);
 26 
 27 int n, m;
 28 int a[sizeOfNumber];
 29 seg * t;
 30 
 31 int main()
 32 {
 33     n=getint();
 34     for (int i=1;i<=n;i++)
 35         a[i]=getint();
 36     t=build(1, n);
 37 
 38     m=getint();
 39     for (int i=1;i<=m;i++)
 40     {
 41         int x=getint(), y=getint();
 42         putint(query(t, 1, n, x, y).smax);
 43     }
 44 
 45     return 0;
 46 }
 47 
 48 inline int max(int x, int y)
 49 {
 50     return x>y?x:y;
 51 }
 52 inline int getint()
 53 {
 54     register int num=0;
 55     register char ch=0, last;
 56     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
 57     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
 58     if (last=='-') num=-num;
 59     return num;
 60 }
 61 inline void putint(int num)
 62 {
 63     char stack[11];
 64     register int top=0;
 65     if (num==0) stack[top=1]='0';
 66     if (num<0) putchar('-'), num=-num;
 67     for ( ;num;num/=10) stack[++top]=num%10+'0';
 68     for ( ;top;top--) putchar(stack[top]);
 69     putchar('
');
 70 }
 71 
 72 inline node::node(int x)
 73 {
 74     lmax=rmax=smax=ssum=x;
 75 }
 76 inline node merge(node a, node b)
 77 {
 78     node c;
 79     c.ssum=a.ssum+b.ssum;
 80     c.lmax=max(a.lmax, a.ssum+b.lmax);
 81     c.rmax=max(a.rmax+b.ssum, b.rmax);
 82     c.smax=max(a.smax, b.smax);
 83     c.smax=max(c.smax, a.rmax+b.lmax);
 84     return c;
 85 }
 86 
 87 inline seg * newseg()
 88 {
 89     seg * ret=port++;
 90     return ret;
 91 }
 92 inline void seg::maintain()
 93 {
 94     this->data=merge(this->l->data, this->r->data);
 95 }
 96 inline seg * build(int l, int r)
 97 {
 98     seg * t=newseg();
 99     int m=(l+r)>>1;
100 
101     if (l==r)
102         t->data=node(a[m]);
103     else
104     {
105         t->l=build(l, m);
106         t->r=build(m+1, r);
107         t->maintain();
108     }
109 
110     return t;
111 }
112 node query(seg * t, int l, int r, int ql, int qr)
113 {
114     node ret;
115     int m=(l+r)>>1;
116 
117     if (l==ql && r==qr) ret=t->data;
118     else
119     {
120         if (qr<=m) ret=query(t->l, l, m, ql, qr);
121         else if (ql>m) ret=query(t->r, m+1, r, ql, qr);
122         else ret=merge(query(t->l, l, m, ql, m), query(t->r, m+1, r, m+1, qr));
123     }
124 
125     return ret;
126 }

GSS1

  1 #include <cstdio>
  2 #include <cstring>
  3 #include <algorithm>
  4 const int sizeOfNumber=100001;
  5 const int sizeOfQuestion=100001;
  6 const int sizeOfSeg=400004;
  7 
  8 inline int max(int, int);
  9 inline int getint();
 10 inline void putint(int);
 11 
 12 struct seg
 13 {
 14     int ssum, lmax;
 15     int flag, maxflag;
 16     seg * l, * r;
 17     inline void pushdown();
 18     inline void maintain();
 19 };
 20 seg memory[sizeOfSeg], * port=memory;
 21 inline seg * newseg();
 22 seg * build(int, int);
 23 void update(seg * , int, int, int, int, int);
 24 int query(seg * , int, int, int, int);
 25 
 26 int n, q;
 27 int a[sizeOfNumber], p[sizeOfNumber];
 28 int d[sizeOfQuestion], l[sizeOfQuestion], r[sizeOfQuestion];
 29 int ans[sizeOfQuestion];
 30 seg * t;
 31 inline bool cmpForQuestion(int, int);
 32 inline bool cmpForDiscrete(int, int);
 33 inline void prepare();
 34 
 35 int main()
 36 {
 37     n=getint();
 38     for (int i=1;i<=n;i++)
 39         a[i]=getint();
 40     prepare();
 41     t=build(1, n);
 42     q=getint();
 43     for (int i=1;i<=q;i++)
 44         l[i]=getint(), r[i]=getint();
 45     for (int i=1;i<=q;i++)
 46         d[i]=i;
 47     std::sort(d+1, d+q+1, cmpForQuestion);
 48 
 49     int j=1;
 50     for (int i=1;i<=n;i++)
 51     {
 52         update(t, 1, n, p[i]+1, i, a[i]);
 53         for ( ;j<=q && r[d[j]]==i;j++)
 54             ans[d[j]]=query(t, 1, n, l[d[j]], r[d[j]]);
 55     }
 56 
 57     for (int i=1;i<=q;i++)
 58         putint(ans[i]);
 59 
 60     return 0;
 61 }
 62 
 63 inline int max(int x, int y)
 64 {
 65     return x>y?x:y;
 66 }
 67 inline int getint()
 68 {
 69     register int num=0;
 70     register char ch=0, last;
 71     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
 72     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
 73     if (last=='-') num=-num;
 74     return num;
 75 }
 76 inline void putint(int num)
 77 {
 78     char stack[11];
 79     register int top=0;
 80     if (num==0) stack[top=1]='0';
 81     if (num<0) putchar('-'), num=-num;
 82     for ( ;num;num/=10) stack[++top]=num%10+'0';
 83     for ( ;top;top--) putchar(stack[top]);
 84     putchar('
');
 85 }
 86 
 87 inline void seg::pushdown()
 88 {
 89     this->l->maxflag=max(this->l->maxflag, this->l->flag+this->maxflag);
 90     this->r->maxflag=max(this->r->maxflag, this->r->flag+this->maxflag);
 91     this->l->flag+=this->flag;
 92     this->r->flag+=this->flag;
 93     this->l->lmax=max(this->l->lmax, this->l->ssum+this->maxflag);
 94     this->r->lmax=max(this->r->lmax, this->r->ssum+this->maxflag);
 95     this->l->ssum+=this->flag;
 96     this->r->ssum+=this->flag;
 97     this->flag=0;
 98     this->maxflag=0;
 99 }
100 inline void seg::maintain()
101 {
102     this->ssum=max(this->l->ssum, this->r->ssum);
103     this->lmax=max(this->l->lmax, this->r->lmax);
104 }
105 inline seg * newseg()
106 {
107     seg * ret=port++;
108     return ret;
109 }
110 seg * build(int l, int r)
111 {
112     seg * t=newseg();
113     int m=(l+r)>>1;
114     if (l==r) return t;
115     t->l=build(l, m);
116     t->r=build(m+1, r);
117     return t;
118 }
119 void update(seg * t, int l, int r, int ql, int qr, int v)
120 {
121     if (l==ql && r==qr)
122     {
123         t->ssum+=v;
124         t->lmax=max(t->lmax, t->ssum);
125         t->flag+=v;
126         t->maxflag=max(t->maxflag, t->flag);
127     }
128     else
129     {
130         int m=(l+r)>>1;
131         t->pushdown();
132         if (qr<=m) update(t->l, l, m, ql, qr, v);
133         else if (ql>m) update(t->r, m+1, r, ql, qr, v);
134         else update(t->l, l, m, ql, m, v), update(t->r, m+1, r, m+1, qr, v);
135         t->maintain();
136     }
137 }
138 int query(seg * t, int l, int r, int ql, int qr)
139 {
140     int ret=0;
141 
142     if (l==ql && r==qr)
143         ret=t->lmax;
144     else
145     {
146         int m=(l+r)>>1;
147         t->pushdown();
148         if (qr<=m) ret=query(t->l, l, m, ql, qr);
149         else if (ql>m) ret=query(t->r, m+1, r, ql, qr);
150         else ret=max(query(t->l, l, m, ql, m), query(t->r, m+1, r, m+1, qr));
151         t->maintain();
152     }
153 
154     return ret;
155 }
156 
157 inline bool cmpForQuestion(int i, int j)
158 {
159     return r[i]<r[j];
160 }
161 inline bool cmpForDiscrete(int i, int j)
162 {
163     return a[i]<a[j];
164 }
165 inline void prepare()
166 {
167     static int d[sizeOfNumber], l[sizeOfNumber];
168     int m, t;
169 
170     for (int i=1;i<=n;i++)
171         l[i]=i;
172     std::sort(l+1, l+n+1, cmpForDiscrete);
173 
174     m=1, t=a[l[m]];
175     d[l[1]]=1;
176     for (int i=2;i<=n;i++)
177     {
178         if (a[l[i]]>t)
179             ++m, t=a[l[i]];
180         d[l[i]]=m;
181     }
182 
183     memset(l, 0, sizeof(l));
184     for (int i=1;i<=n;i++)
185     {
186         p[i]=l[d[i]];
187         l[d[i]]=i;
188     }
189 }

GSS2

  1 #include <cstdio>
  2 const int sizeOfNumber=50005;
  3 const int sizeOfSeg=200002;
  4 
  5 inline int max(int, int);
  6 inline int getint();
  7 inline void putint(int);
  8 
  9 struct node
 10 {
 11     int lmax, rmax, smax, ssum;
 12     inline node(int=0);
 13 };
 14 inline node merge(node, node);
 15 
 16 struct seg
 17 {
 18     node data;
 19     seg * l, * r;
 20     inline void maintain();
 21 };
 22 seg memory[sizeOfSeg], * port=memory;
 23 inline seg * newseg();
 24 seg * build(int, int);
 25 void update(seg * , int, int, int);
 26 node query(seg * , int, int, int, int);
 27 
 28 int n, m;
 29 int a[sizeOfNumber];
 30 seg * t;
 31 
 32 int main()
 33 {
 34     n=getint();
 35     for (int i=1;i<=n;i++)
 36         a[i]=getint();
 37     t=build(1, n);
 38 
 39     m=getint();
 40     for (int i=1;i<=m;i++)
 41     {
 42         int k=getint(), x=getint(), y=getint();
 43         if (k==1)
 44             putint(query(t, 1, n, x, y).smax);
 45         else
 46         {
 47             a[x]=y;
 48             update(t, 1, n, x);
 49         }
 50     }
 51 
 52     return 0;
 53 }
 54 
 55 inline int max(int x, int y)
 56 {
 57     return x>y?x:y;
 58 }
 59 inline int getint()
 60 {
 61     register int num=0;
 62     register char ch=0, last;
 63     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
 64     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
 65     if (last=='-') num=-num;
 66     return num;
 67 }
 68 inline void putint(int num)
 69 {
 70     char stack[11];
 71     register int top=0;
 72     if (num==0) stack[top=1]='0';
 73     if (num<0) putchar('-'), num=-num;
 74     for ( ;num;num/=10) stack[++top]=num%10+'0';
 75     for ( ;top;top--) putchar(stack[top]);
 76     putchar('
');
 77 }
 78 
 79 inline node::node(int x)
 80 {
 81     lmax=rmax=smax=ssum=x;
 82 }
 83 inline node merge(node a, node b)
 84 {
 85     node c;
 86     c.ssum=a.ssum+b.ssum;
 87     c.lmax=max(a.lmax, a.ssum+b.lmax);
 88     c.rmax=max(a.rmax+b.ssum, b.rmax);
 89     c.smax=max(a.smax, b.smax);
 90     c.smax=max(c.smax, a.rmax+b.lmax);
 91     return c;
 92 }
 93 
 94 inline seg * newseg()
 95 {
 96     seg * ret=port++;
 97     return ret;
 98 }
 99 inline void seg::maintain()
100 {
101     this->data=merge(this->l->data, this->r->data);
102 }
103 inline seg * build(int l, int r)
104 {
105     seg * t=newseg();
106     int m=(l+r)>>1;
107 
108     if (l==r)
109         t->data=node(a[m]);
110     else
111     {
112         t->l=build(l, m);
113         t->r=build(m+1, r);
114         t->maintain();
115     }
116 
117     return t;
118 }
119 void update(seg * t, int l, int r, int k)
120 {
121     int m=(l+r)>>1;
122 
123     if (l==r)
124         t->data=node(a[m]);
125     else
126     {
127         if (k<=m) update(t->l, l, m, k);
128         else update(t->r, m+1, r, k);
129         t->maintain();
130     }
131 }
132 node query(seg * t, int l, int r, int ql, int qr)
133 {
134     node ret;
135     int m=(l+r)>>1;
136 
137     if (l==ql && r==qr) ret=t->data;
138     else
139     {
140         if (qr<=m) ret=query(t->l, l, m, ql, qr);
141         else if (ql>m) ret=query(t->r, m+1, r, ql, qr);
142         else ret=merge(query(t->l, l, m, ql, m), query(t->r, m+1, r, m+1, qr));
143     }
144 
145     return ret;
146 }

GSS3

  1 #include <cstdio>
  2 #include <cmath>
  3 typedef long long LL;
  4 const int sizeOfNumber=100001;
  5 const int sizeOfSeg=400004;
  6 
  7 inline void swap(int & , int & );
  8 inline LL getint();
  9 inline void putint(LL);
 10 
 11 struct seg
 12 {
 13     LL sum;
 14     bool flag;
 15     seg * l, * r;
 16     inline void maintain();
 17 };
 18 seg memory[sizeOfSeg], * port=memory;
 19 inline seg * newseg();
 20 seg * build(int, int);
 21 void update(seg * , int, int, int, int);
 22 LL query(seg * , int, int, int, int);
 23 
 24 int n, m;
 25 LL a[sizeOfNumber];
 26 seg * t;
 27 
 28 int main()
 29 {
 30     int c=0;
 31 
 32     while (scanf("%d", &n)!=EOF)
 33     {
 34         for (int i=1;i<=n;i++)
 35             a[i]=getint();
 36         port=memory;
 37         t=build(1, n);
 38 
 39         printf("Case #%d:
", ++c);
 40 
 41         m=getint();
 42         for (int i=1;i<=m;i++)
 43         {
 44             int k=getint(), x=getint(), y=getint();
 45             if (x>y) swap(x, y);
 46             if (k==0) update(t, 1, n, x, y);
 47             else putint(query(t, 1, n, x, y));
 48         }
 49     }
 50 
 51     return 0;
 52 }
 53 
 54 inline void swap(int & x, int & y)
 55 {
 56     int t=x; x=y; y=t;
 57 }
 58 inline LL getint()
 59 {
 60     register LL num=0;
 61     register char ch;
 62     do ch=getchar(); while (ch<'0' || ch>'9');
 63     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
 64     return num;
 65 }
 66 inline void putint(LL num)
 67 {
 68     char stack[22];
 69     register int top=0;
 70     if (num==0) stack[top=1]='0';
 71     for ( ;num;num/=10) stack[++top]=num%10+'0';
 72     for ( ;top;top--) putchar(stack[top]);
 73     putchar('
');
 74 }
 75 
 76 inline void seg::maintain()
 77 {
 78     sum=l->sum+r->sum;
 79     flag=l->flag&r->flag;
 80 }
 81 inline seg * newseg()
 82 {
 83     return port++;
 84 }
 85 seg * build(int l, int r)
 86 {
 87     seg * t=newseg();
 88     int m=(l+r)>>1;
 89 
 90     if (l==r)
 91     {
 92         t->sum=a[m];
 93         t->flag=t->sum<=1;
 94     }
 95     else
 96     {
 97         t->l=build(l, m);
 98         t->r=build(m+1, r);
 99         t->maintain();
100     }
101 
102     return t;
103 }
104 void update(seg * t, int l, int r, int ql, int qr)
105 {
106     if (t->flag)
107         return ;
108     if (l==r && ql==qr)
109     {
110         t->sum=static_cast<int>(sqrt(t->sum));
111         t->flag=t->sum<=1;
112         return ;
113     }
114 
115     int m=(l+r)>>1;
116     if (qr<=m) update(t->l, l, m, ql, qr);
117     else if (ql>m) update(t->r, m+1, r, ql, qr);
118     else update(t->l, l, m, ql, m), update(t->r, m+1, r, m+1, qr);
119     t->maintain();
120 }
121 LL query(seg * t, int l, int r, int ql, int qr)
122 {
123     if (l==ql && r==qr)
124         return t->sum;
125     int m=(l+r)>>1;
126     if (qr<=m) return query(t->l, l, m, ql, qr);
127     else if (ql>m) return query(t->r, m+1, r, ql, qr);
128     else return query(t->l, l, m, ql, m)+query(t->r, m+1, r, m+1, qr);
129 }

GSS4

  1 #include <cstdio>
  2 const int sizeOfNumber=10001;
  3 const int sizeOfSeg=40004;
  4 const int inf=0x3F3F3F3F;
  5 
  6 inline int max(int, int);
  7 inline int getint();
  8 inline void putint(int);
  9 
 10 struct node
 11 {
 12     int lmax, rmax, smax, ssum;
 13     inline node(int=0);
 14 };
 15 inline node merge(node, node);
 16 
 17 struct seg
 18 {
 19     node data;
 20     seg * l, * r;
 21     inline void maintain();
 22 };
 23 seg memory[sizeOfSeg], * port=memory;
 24 inline seg * newseg();
 25 seg * build(int, int);
 26 node query(seg * , int, int, int, int);
 27 
 28 int c, n, m;
 29 int a[sizeOfNumber];
 30 seg * t;
 31 
 32 int main()
 33 {
 34     int ans;
 35 
 36     for (c=getint();c;c--)
 37     {
 38         n=getint();
 39         for (int i=1;i<=n;i++)
 40             a[i]=getint();
 41         port=memory;
 42         t=build(1, n);
 43 
 44         m=getint();
 45         for (int i=1;i<=m;i++)
 46         {
 47             int x1=getint(), y1=getint(), x2=getint(), y2=getint();
 48 
 49             if (y1<x2)
 50                 ans=query(t, 1, n, x1, y1).rmax+query(t, 1, n, x2, y2).lmax+query(t, 1, n, y1+1, x2-1).ssum;
 51             else
 52             {
 53                 node l=query(t, 1, n, x1, x2-1), m=query(t, 1, n, x2, y1), r=query(t, 1, n, y1+1, y2);
 54                 ans=max(merge(l, m).rmax+r.lmax, l.rmax+merge(m, r).lmax);
 55                 ans=max(ans, l.rmax+m.ssum+r.lmax);
 56                 ans=max(ans, m.smax);
 57             }
 58 
 59             putint(ans);
 60         }
 61     }
 62 
 63     return 0;
 64 }
 65 
 66 inline int max(int x, int y)
 67 {
 68     return x>y?x:y;
 69 }
 70 inline int getint()
 71 {
 72     register int num=0;
 73     register char ch=0, last;
 74     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
 75     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
 76     if (last=='-') num=-num;
 77     return num;
 78 }
 79 inline void putint(int num)
 80 {
 81     char stack[11];
 82     register int top=0;
 83     if (num==0) stack[top=1]='0';
 84     if (num<0) putchar('-'), num=-num;
 85     for ( ;num;num/=10) stack[++top]=num%10+'0';
 86     for ( ;top;top--) putchar(stack[top]);
 87     putchar('
');
 88 }
 89 
 90 inline node::node(int x)
 91 {
 92     lmax=rmax=smax=ssum=x;
 93 }
 94 inline node merge(node a, node b)
 95 {
 96     node c;
 97     c.ssum=a.ssum+b.ssum;
 98     c.lmax=max(a.lmax, a.ssum+b.lmax);
 99     c.rmax=max(a.rmax+b.ssum, b.rmax);
100     c.smax=max(a.smax, b.smax);
101     c.smax=max(c.smax, a.rmax+b.lmax);
102     return c;
103 }
104 
105 inline seg * newseg()
106 {
107     seg * ret=port++;
108     return ret;
109 }
110 inline void seg::maintain()
111 {
112     this->data=merge(this->l->data, this->r->data);
113 }
114 inline seg * build(int l, int r)
115 {
116     seg * t=newseg();
117     int m=(l+r)>>1;
118 
119     if (l==r)
120         t->data=node(a[m]);
121     else
122     {
123         t->l=build(l, m);
124         t->r=build(m+1, r);
125         t->maintain();
126     }
127 
128     return t;
129 }
130 node query(seg * t, int l, int r, int ql, int qr)
131 {
132     node ret(0);
133     int m=(l+r)>>1;
134 
135     if (ql>qr) return ret;
136     if (l==ql && r==qr) ret=t->data;
137     else
138     {
139         if (qr<=m) ret=query(t->l, l, m, ql, qr);
140         else if (ql>m) ret=query(t->r, m+1, r, ql, qr);
141         else ret=merge(query(t->l, l, m, ql, m), query(t->r, m+1, r, m+1, qr));
142     }
143 
144     return ret;
145 }

GSS5

  1 #include <cstdio>
  2 #include <cstdlib>
  3 const int sizeOfNumber=100001;
  4 const int sizeOfTreap=200002;
  5 const int inf=0x3F3F3F3F;
  6 
  7 inline int max(int, int);
  8 inline char getch();
  9 inline int getint();
 10 inline void putint(int);
 11 
 12 struct treap
 13 {
 14     int key, sum;
 15     int lmax, rmax, smax;
 16     int size, weight;
 17     treap * l, * r;
 18     inline treap();
 19     inline void maintain();
 20 };
 21 treap * null=new treap();
 22 treap memory[sizeOfTreap], * port=memory;
 23 inline treap * newtreap(int);
 24 void split(treap * , int, treap *& , treap *& );
 25 treap * merge(treap * ,  treap * );
 26 
 27 int N, Q;
 28 treap * t;
 29 
 30 int main()
 31 {
 32     treap * l, * m, * r;
 33     char c;
 34     int x, y;
 35 
 36     N=getint();
 37     t=null;
 38     for (int i=1;i<=N;i++)
 39     {
 40         x=getint();
 41         t=merge(t, newtreap(x));
 42     }
 43 
 44     Q=getint();
 45     for (int i=1;i<=Q;i++)
 46     {
 47         c=getch(); x=getint();
 48 
 49         if (c=='I')
 50         {
 51             y=getint();
 52             split(t, x-1, l, r);
 53             m=newtreap(y);
 54             l=merge(l, m);
 55             t=merge(l, r);
 56         }
 57         else if (c=='D')
 58         {
 59             split(t, x-1, l, r);
 60             split(r, 1, m, r);
 61             t=merge(l, r);
 62         }
 63         else if (c=='R')
 64         {
 65             y=getint();
 66             split(t, x-1, l, r);
 67             split(r, 1, m, r);
 68             m=newtreap(y);
 69             l=merge(l, m);
 70             t=merge(l, r);
 71         }
 72         else
 73         {
 74             y=getint();
 75             split(t, x-1, l, r);
 76             split(r, y-x+1, m, r);
 77             putint(m->smax);
 78             l=merge(l, m);
 79             t=merge(l, r);
 80         }
 81     }
 82 
 83     return 0;
 84 }
 85 
 86 inline int max(int x, int y)
 87 {
 88     return x>y?x:y;
 89 }
 90 inline char getch()
 91 {
 92     register char ch;
 93     do ch=getchar(); while (ch!='I' && ch!='D' && ch!='R' && ch!='Q');
 94     return ch;
 95 }
 96 inline int getint()
 97 {
 98     register int num=0;
 99     register char ch=0, last;
100     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
101     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
102     if (last=='-') num=-num;
103     return num;
104 }
105 inline void putint(int num)
106 {
107     char stack[11];
108     register int top=0;
109     if (num==0) stack[top=1]='0';
110     if (num<0) putchar('-'), num=-num;
111     for ( ;num;num/=10) stack[++top]=num%10+'0';
112     for ( ;top;top--) putchar(stack[top]);
113     putchar('
');
114 }
115 
116 inline treap::treap()
117 {
118     this->key=0; this->sum=0;
119     this->lmax=-inf; this->rmax=-inf; this->smax=-inf;
120     this->size=0; this->weight=0;
121     this->l=this->r=this;
122 }
123 inline void treap::maintain()
124 {
125     this->sum=this->l->sum+this->key+this->r->sum;
126 
127     this->lmax=max(this->l->lmax, this->l->sum+this->key); this->lmax=max(this->lmax, this->l->sum+this->key+this->r->lmax);
128     this->rmax=max(this->r->rmax, this->key+this->r->sum); this->rmax=max(this->rmax, this->l->rmax+this->key+this->r->sum);
129 
130     this->smax=max(this->l->smax, this->r->smax); this->smax=max(this->smax, this->l->rmax+this->key+this->r->lmax);
131     this->smax=max(this->smax, this->l->rmax+this->key); this->smax=max(this->smax, this->key+this->r->lmax);
132     this->smax=max(this->smax, this->key);
133 
134     this->size=this->l->size+1+this->r->size;
135 }
136 inline treap * newtreap(int _key)
137 {
138     treap * ret=port++;
139     ret->key=_key; ret->sum=_key;
140     ret->lmax=ret->rmax=ret->smax=_key;
141     ret->size=1; ret->weight=rand();
142     ret->l=ret->r=null;
143     return ret;
144 }
145 void split(treap * t, int k, treap *& l, treap *& r)
146 {
147     if (t==null)
148     {
149         l=r=null;
150         return ;
151     }
152 
153     if (t->l->size+1<=k)
154     {
155         l=t;
156         split(t->r, k-t->l->size-1, t->r, r);
157         l->maintain();
158     }
159     else
160     {
161         r=t;
162         split(t->l, k, l, t->l);
163         r->maintain();
164     }
165 }
166 treap * merge(treap * l, treap * r)
167 {
168     if (l==null) return r;
169     if (r==null) return l;
170 
171     if (l->weight>r->weight)
172     {
173         l->r=merge(l->r, r);
174         l->maintain();
175         return l;
176     }
177     else
178     {
179         r->l=merge(l, r->l);
180         r->maintain();
181         return r;
182     }
183 }

GSS6

  1 #include <cstdio>
  2 #include <cstring>
  3 const int sizeOfNumber=100001;
  4 const int sizeOfEdge=200002;
  5 const int sizeOfSeg=400004;
  6 const int inf=0x7FFFFFFF;
  7 
  8 inline int lg(int);
  9 inline void swap(int & , int & );
 10 inline int max(int, int);
 11 inline int getint();
 12 inline void putint(int);
 13 
 14 struct edge
 15 {
 16     int point;
 17     edge * next;
 18 };
 19 edge memoryOfEdge[sizeOfEdge], * portOfEdge=memoryOfEdge;
 20 inline edge * newedge(int, edge * );
 21 inline void link(int, int);
 22 
 23 struct node
 24 {
 25     int lmax, rmax, smax, ssum;
 26     inline node(int=0);
 27 };
 28 inline node merge(node, node);
 29 
 30 struct seg
 31 {
 32     node data;
 33     int flag, size;
 34     seg * l, * r;
 35     inline void pushdown();
 36     inline void maintain();
 37 };
 38 seg memoryOfSeg[sizeOfSeg], * portOfSeg=memoryOfSeg;
 39 inline seg * newseg();
 40 seg * build(int, int);
 41 void update(seg * , int, int, int, int, int);
 42 node query(seg * , int, int, int, int);
 43 
 44 int n, q;
 45 int x[sizeOfNumber];
 46 edge * e[sizeOfNumber];
 47 int a[20][sizeOfNumber];
 48 int s[sizeOfNumber], d[sizeOfNumber], f[sizeOfNumber];
 49 int tmp, idx[sizeOfNumber], r_idx[sizeOfNumber], son[sizeOfNumber], top[sizeOfNumber];
 50 seg * t;
 51 inline void dfsTree();
 52 inline void dfsChain();
 53 inline int lca(int, int);
 54 inline int anc(int, int);
 55 inline void update(int, int, int);
 56 inline node query(int, int);
 57 
 58 int main()
 59 {
 60     n=getint();
 61     for (int i=1;i<=n;i++)
 62         x[i]=getint();
 63     for (int i=1;i<n;i++)
 64     {
 65         int u=getint(), v=getint();
 66         link(u, v);
 67     }
 68     dfsTree();
 69     dfsChain();
 70 
 71     t=build(1, n);
 72     q=getint();
 73     for (int i=1;i<=q;i++)
 74     {
 75         int k=getint(), x=getint(), y=getint();
 76 
 77         if (k==1)
 78         {
 79             if (d[x]>d[y])
 80                 swap(x, y);
 81             if (x==y)
 82             {
 83                 putint(query(t, 1, n, idx[x], idx[x]).smax);
 84                 continue;
 85             }
 86 
 87             int a=lca(x, y), z=anc(y, d[y]-d[a]-1);
 88             node l=query(y, z), r=query(x, a);
 89             swap(l.lmax, l.rmax);
 90             putint(merge(l, r).smax);
 91         }
 92         else
 93         {
 94             int z=getint();
 95             update(x, y, z);
 96         }
 97     }
 98 
 99     return 0;
100 }
101 
102 inline int lg(int x)
103 {
104     return x>1?31-__builtin_clz(x):0;
105 }
106 inline void swap(int & x, int & y)
107 {
108     int z=x; x=y; y=z;
109 }
110 inline int max(int x, int y)
111 {
112     return x>y?x:y;
113 }
114 inline int getint()
115 {
116     register int num=0;
117     register char ch=0, last;
118     do last=ch, ch=getchar(); while (ch<'0' || ch>'9');
119     do num=num*10+ch-'0', ch=getchar(); while (ch>='0' && ch<='9');
120     if (last=='-') num=-num;
121     return num;
122 }
123 inline void putint(int num)
124 {
125     char stack[11];
126     register int top=0;
127     if (num==0) stack[top=1]='0';
128     if (num<0) putchar('-'), num=-num;
129     for ( ;num;num/=10) stack[++top]=num%10+'0';
130     for ( ;top;top--) putchar(stack[top]);
131     putchar('
');
132 }
133 
134 inline edge * newedge(int point, edge * next)
135 {
136     edge * ret=portOfEdge++;
137     ret->point=point; ret->next=next;
138     return ret;
139 }
140 inline void link(int u, int v)
141 {
142     e[u]=newedge(v, e[u]);
143     e[v]=newedge(u, e[v]);
144 }
145 
146 inline node::node(int x)
147 {
148     ssum=x;
149     lmax=rmax=smax=max(x, 0);
150 }
151 inline node merge(node a, node b)
152 {
153     node c;
154     c.ssum=a.ssum+b.ssum;
155     c.lmax=max(a.lmax, a.ssum+b.lmax);
156     c.rmax=max(a.rmax+b.ssum, b.rmax);
157     c.smax=max(a.smax, b.smax);
158     c.smax=max(c.smax, a.rmax+b.lmax);
159     return c;
160 }
161 
162 inline void seg::pushdown()
163 {
164     if (this->flag<inf)
165     {
166         this->l->data.ssum=this->l->size*this->flag;
167         this->r->data.ssum=this->r->size*this->flag;
168         this->l->data.lmax=this->l->data.rmax=this->l->data.smax=max(this->l->data.ssum, 0);
169         this->r->data.lmax=this->r->data.rmax=this->r->data.smax=max(this->r->data.ssum, 0);
170         this->l->flag=this->r->flag=this->flag;
171         this->flag=inf;
172     }
173 }
174 inline void seg::maintain()
175 {
176     this->data=merge(this->l->data, this->r->data);
177     this->size=this->l->size+this->r->size;
178 }
179 inline seg * newseg()
180 {
181     seg * ret=portOfSeg++;
182     ret->flag=inf;
183     return ret;
184 }
185 seg * build(int l, int r)
186 {
187     seg * t=newseg();
188     int m=(l+r)>>1;
189 
190     if (l==r)
191     {
192         t->data=node(x[r_idx[m]]);
193         t->size=1;
194     }
195     else
196     {
197         t->l=build(l, m);
198         t->r=build(m+1, r);
199         t->maintain();
200     }
201 
202     return t;
203 }
204 void update (seg * t, int l, int r, int ql, int qr, int v)
205 {
206     if (l==ql && r==qr)
207     {
208         t->data.ssum=t->size*v;
209         t->data.lmax=t->data.rmax=t->data.smax=max(t->data.ssum, 0);
210         t->flag=v;
211     }
212     else
213     {
214         int m=(l+r)>>1;
215         t->pushdown();
216         if (qr<=m) update(t->l, l, m, ql, qr, v);
217         else if (ql>m) update(t->r, m+1, r, ql, qr, v);
218         else update(t->l, l, m, ql, m, v), update(t->r, m+1, r, m+1, qr, v);
219         t->maintain();
220     }
221 }
222 node query(seg * t, int l, int r, int ql, int qr)
223 {
224     node ret;
225 
226     if (l==ql && r==qr)
227         ret=t->data;
228     else
229     {
230         int m=(l+r)>>1;
231         t->pushdown();
232         if (qr<=m) ret=query(t->l, l, m, ql, qr);
233         else if (ql>m) ret=query(t->r, m+1, r, ql, qr);
234         else ret=merge(query(t->l, l, m, ql, m), query(t->r, m+1, r, m+1, qr));
235         t->maintain();
236     }
237 
238     return ret;
239 }
240 
241 inline void dfsTree()
242 {
243     static edge * t[sizeOfNumber];
244     memset(f, 0xFF, sizeof(f)); f[1]=0;
245     memmove(t, e, sizeof(e));
246     int lim;
247 
248     for (int u=1;true; )
249     {
250         if (!s[u])
251         {
252             s[u]=1; lim=lg(d[u]);
253             a[0][u]=f[u];
254             for (int i=1;i<=lim;i++)
255                 a[i][u]=a[i-1][a[i-1][u]];
256         }
257 
258         edge *& i=t[u];
259         for ( ;i && f[i->point]>=0;i=i->next);
260         if (i)
261         {
262             f[i->point]=u;
263             d[i->point]=d[u]+1;
264             u=i->point;
265         }
266         else
267         {
268             if (u==1) break;
269             s[f[u]]+=s[u];
270             if (s[u]>s[son[f[u]]])
271                 son[f[u]]=u;
272             u=f[u];
273         }
274     }
275 }
276 inline void dfsChain()
277 {
278     static edge * t[sizeOfNumber];
279     memmove(t, e, sizeof(e));
280 
281     top[1]=1;
282     for (int u=1;true; )
283     {
284         if (!idx[u])
285         {
286             idx[u]=++tmp;
287             r_idx[tmp]=u;
288         }
289         if (son[u] && !idx[son[u]])
290         {
291             top[son[u]]=top[u];
292             u=son[u];
293             continue;
294         }
295 
296         edge *& i=t[u];
297         for ( ;i && idx[i->point];i=i->next);
298         if (i)
299         {
300             top[i->point]=i->point;
301             u=i->point;
302         }
303         else
304         {
305             if (u==1)
306                 break;
307             u=f[u];
308         }
309     }
310 }
311 inline int lca(int u, int v)
312 {
313     if (d[u]<d[v]) swap(u, v);
314     while (int dist=d[u]-d[v])
315         u=a[__builtin_ctz(dist)][u];
316     if (u==v) return u;
317     for (int i=19;i>=0;i--)
318         if (a[i][u]!=a[i][v])
319             u=a[i][u],
320             v=a[i][v];
321     return a[0][u];
322 }
323 inline int anc(int u, int d)
324 {
325     for (int i=19;i>=0;i--)
326         if ((d>>i)&1)
327             u=a[i][u];
328     return u;
329 }
330 inline void update(int u, int v, int c)
331 {
332     while (top[u]!=top[v])
333     {
334         if (d[top[u]]<d[top[v]]) swap(u, v);
335         update(t, 1, n, idx[top[u]], idx[u], c);
336         u=f[top[u]];
337     }
338     if (d[u]>d[v]) swap(u, v);
339     update(t, 1, n, idx[u], idx[v], c);
340 }
341 inline node query(int u, int a)
342 {
343     node ret;
344 
345     while (top[u]!=top[a])
346     {
347         ret=merge(query(t, 1, n, idx[top[u]], idx[u]), ret);
348         u=f[top[u]];
349     }
350     ret=merge(query(t, 1, n, idx[a], idx[u]), ret);
351 
352     return ret;
353 }

GSS7

  1 #include <cstdio>
  2 #include <cstring>
  3 typedef long long llint;
  4 typedef unsigned int uint;
  5 
  6 namespace IO
  7 {
  8     const int sizeOfInput=33554432;
  9     char inputBuffer[sizeOfInput], * port=inputBuffer;
 10 
 11     inline void assign();
 12     inline void close();
 13     inline char getch();
 14     inline uint getint();
 15     inline void putint(uint);
 16 };
 17 
 18 namespace random
 19 {
 20     llint num, seed, mod;
 21     inline void srand();
 22     inline int getrand();
 23 };
 24 
 25 namespace treap
 26 {
 27     const int sizeOfMemory=262144;
 28     uint C[11][11];
 29     uint P[sizeOfMemory][11];
 30 
 31     struct node
 32     {
 33         uint c[11];
 34         uint key, size;
 35         int weight;
 36         node * left, * right;
 37 
 38         inline node();
 39         inline void maintain();
 40     };
 41     node * null=new node();
 42     node memory[sizeOfMemory], * port=memory;
 43 
 44     inline void prepare();
 45     inline node * newnode(uint);
 46     inline void update(node * , uint);
 47     void split(node * , uint, node *& , node *& );
 48     node * merge(node * , node * );
 49 };
 50 
 51 int main()
 52 {
 53     using namespace treap;
 54     using namespace IO;
 55 
 56     node * root=null;
 57     node * L, * M, * R;
 58     int N, Q;
 59     int pos, val, l, r, k;
 60     char ch;
 61 
 62     assign();
 63     random::srand();
 64     prepare();
 65 
 66     N=getint();
 67     for (int i=0;i<N;i++)
 68         root=merge(root, newnode(getint()));
 69 
 70     for (Q=getint();Q;Q--)
 71     {
 72         ch=getch();
 73         if (ch=='I')
 74         {
 75             pos=getint(), val=getint();
 76             M=treap::newnode(val);
 77             split(root, pos, L, R);
 78             L=merge(L, M);
 79             root=merge(L, R);
 80         }
 81         else if (ch=='D')
 82         {
 83             pos=getint();
 84             split(root, pos, L, R);
 85             split(R, 1, M, R);
 86             root=merge(L, R);
 87         }
 88         else if (ch=='R')
 89         {
 90             pos=getint(), val=getint();
 91             split(root, pos, L, R);
 92             split(R, 1, M, R);
 93             update(M, val);
 94             L=merge(L, M);
 95             root=merge(L, R);
 96         }
 97         else
 98         {
 99             l=getint(), r=getint(), k=getint();
100             split(root, r+1, L, R);
101             split(L, l, L, M);
102             putint(M->c[k]);
103             L=merge(L, M);
104             root=merge(L, R);
105         }
106     }
107 
108     return 0;
109 }
110 
111 namespace IO
112 {
113     inline void assign()
114     {
115         freopen("GSS8.in", "r", stdin);
116         freopen("GSS8.out", "w", stdout);
117         fread(inputBuffer, 1, 33554432, stdin);
118     }
119     inline void close()
120     {
121         fclose(stdin);
122         fclose(stdout);
123     }
124     inline char getch()
125     {
126         register char ch;
127         do ch=*(port++); while (ch<'A' || ch>'Z');
128         return ch;
129     }
130     inline uint getint()
131     {
132         register uint num=0;
133         register char ch;
134         do ch=*(port++); while (ch<'0' || ch>'9');
135         do num=num*10+ch-'0', ch=*(port++); while (ch>='0' && ch<='9');
136         return num;
137     }
138     inline void putint(uint num)
139     {
140         char stack[16];
141         register int top=0;
142         if (num==0) stack[top=1]='0';
143         for ( ;num;num/=10) stack[++top]=num%10+'0';
144         for ( ;top;top--) putchar(stack[top]);
145         putchar('
');
146     }
147 }
148 
149 namespace random
150 {
151     inline void srand()
152     {
153         num=1, seed=48271, mod=2147483647;
154         for (int i=1;i<=233;i++)
155             getrand();
156     }
157     inline int getrand()
158     {
159         num=num*seed%mod;
160         return num;
161     }
162 }
163 
164 namespace treap
165 {
166     inline node::node()
167     {
168         memset(c, 0, sizeof(c));
169         key=size=0;
170         weight=0;
171         left=right=this;
172     }
173     inline void node::maintain()
174     {
175         int tmp=left->size+1;
176         size=left->size+1+right->size;
177 
178         for (int i=0;i<=10;i++) c[i]=left->c[i];
179         for (int i=0;i<=10;i++) c[i]+=key*P[tmp][i];
180         for (int i=0;i<=10;i++) for (int j=0;j<=i;j++)
181             c[i]+=C[i][j]*P[tmp][i-j]*right->c[j];
182     }
183     inline void prepare()
184     {
185         C[0][0]=1;
186         for (int i=1;i<=10;i++)
187         {
188             C[i][0]=1;
189             for (int j=1;j<i;j++)
190                 C[i][j]=C[i-1][j-1]+C[i-1][j];
191             C[i][i]=1;
192         }
193 
194         for (int i=0;i<sizeOfMemory;i++)
195         {
196             P[i][0]=1;
197             for (int j=1;j<=10;j++)
198                 P[i][j]=P[i][j-1]*i;
199         }
200     }
201     inline node * newnode(uint _key)
202     {
203         node * ret=port++;
204         for (int i=0;i<=10;i++) ret->c[i]=_key;
205         ret->key=_key, ret->size=1;
206         ret->weight=random::getrand();
207         ret->left=ret->right=null;
208         return ret;
209     }
210     inline void update(node * t, uint _key)
211     {
212         for (int i=0;i<=10;i++) t->c[i]=_key;
213         t->key=_key;
214     }
215     void split(node * t, uint k, node *& l, node *& r)
216     {
217         if (t==null) l=r=null;
218         else
219         {
220             if (t->left->size<k)
221             {
222                 l=t;
223                 split(t->right, k-t->left->size-1, t->right, r);
224                 l->maintain();
225             }
226             else
227             {
228                 r=t;
229                 split(t->left, k, l, t->left);
230                 r->maintain();
231             }
232         }
233     }
234     node * merge(node * l, node * r)
235     {
236         if (l==null) return r->maintain(), r;
237         if (r==null) return l->maintain(), l;
238         if (l->weight>r->weight)
239         {
240             l->right=merge(l->right, r);
241             l->maintain();
242             return l;
243         }
244         else
245         {
246             r->left=merge(l, r->left);
247             r->maintain();
248             return r;
249         }
250     }
251 }

GSS8

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原文地址：https://www.cnblogs.com/dyllalala/p/4204494.html