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  • 紫书第三章习题

    UVA 1585

    这题我居然wa了3次,看来我真的好渣,想了想我的是当只有一个O的时候越界了,果然还是代码风格太差,需要改进!!

    #include <bits/stdc++.h>
    using namespace std;
    
    typedef long long ll;
    const int INF=0x3f3f3f3f;
    const ll LINF=0x3f3f3f3f3f3f3f3f;
    #define PI(A) cout<<(A)<<endl
    #define SI(N) cin>>(N)
    #define SII(N,M) cin>>(N)>>(M)
    #define cle(a,val) memset(a,(val),sizeof(a))
    #define rep(i,b) for(int i=0;i<(b);i++)
    #define Rep(i,a,b) for(int i=(a);i<=(b);i++)
    #define reRep(i,a,b) for(int i=(a);i>=(b);i--)
    #define dbg(x) cout <<#x<<" = "<<(x)<<endl
    #define PIar(a,n) rep(i,n)cout<<a[i]<<" ";cout<<endl;
    #define PIarr(a,n,m) rep(aa,n){rep(bb, m)cout<<a[aa][bb]<<" ";cout<<endl;}
    const double EPS= 1e-9 ;
    
    /*  /////////////////////////     C o d i n g  S p a c e     /////////////////////////  */
    
    const int MAXN= 80 + 9 ;
    int a[MAXN];
    string s;
    
    int main()
    {
        SI(o);
        while(o--)
        {
            cle(a,0);
            SI(s);
            int l=s.size();
            //这块要初始化0,否则会越界
            a[0]=(s[0]=='O');
            Rep(i,1,l-1)
            {
                if (s[i]=='O')
                {
                    if (!a[i-1])
                    a[i]++;
                    else a[i]=a[i-1]+1;
                }
                else
                {
                    a[i]=0;
                }
            }
            ll sum=0;
            rep(i,l) sum+=a[i];
            PI(sum);
        }
    
        return 0;
    }
    

    UVA 1586

    这题告诉了我不可能全用cin,有的时候还是必须要用scanf的,还有函数isalpha(判断是否为英文) 和 isdigit(判断是否为数字) 能使代码更简洁,最后让你输出%.3f 就不能输出%f,那样会WA的。

    #include <bits/stdc++.h>
    using namespace std;
    
    typedef long long ll;
    const int INF=0x3f3f3f3f;
    const ll LINF=0x3f3f3f3f3f3f3f3f;
    #define PI(A) cout<<(A)<<endl
    #define SI(N) cin>>(N)
    #define SII(N,M) cin>>(N)>>(M)
    #define cle(a,val) memset(a,(val),sizeof(a))
    #define rep(i,b) for(int i=0;i<(b);i++)
    #define Rep(i,a,b) for(int i=(a);i<=(b);i++)
    #define reRep(i,a,b) for(int i=(a);i>=(b);i--)
    #define dbg(x) cout <<#x<<" = "<<(x)<<endl
    #define PIar(a,n) rep(i,n)cout<<a[i]<<" ";cout<<endl;
    #define PIarr(a,n,m) rep(aa,n){rep(bb, m)cout<<a[aa][bb]<<" ";cout<<endl;}
    const double EPS= 1e-9 ;
    
    /*  /////////////////////////     C o d i n g  S p a c e     /////////////////////////  */
    
    const int MAXN= 80 + 9 ;
    int n;
    string s;
    bool us[MAXN];
    
    int main()
    {
        scanf("%d%*c",&n);
        while(n--)
        {
            cle(us,0);
            getline(cin,s);
            int l=s.size();
            map<char,int>mci;
            rep(i,l)
            {
                if (isalpha(s[i]))
                {
                    mci[s[i]]++;
                    us[i]=1;
                }
            }
            rep(i,l)
            {
                if (isdigit(s[i]))
                {
                    int sum=0;
                    if (i+1<l&&isdigit(s[i+1]))
                    {
                        sum+=s[i+1]-'0';
                        sum+=(s[i]-'0')*10;
                    }
                    else
                        sum+=s[i]-'0';
                    mci[s[i-1]]+=sum-1;
                }
            }
            double ans=12.01*mci['C']+1.008*mci['H']+16.00*mci['O']+14.01*mci['N'];
            printf("%.3f
    ",ans);
        }
        return 0;
    }
    

    UVA 1225

    数据范围小,纯模拟可A,但当时我在想,要用数学公式,搞了半天也没弄出来,坑 = =

    #include <bits/stdc++.h>
    using namespace std;
    
    typedef long long ll;
    const int INF=0x3f3f3f3f;
    const ll LINF=0x3f3f3f3f3f3f3f3f;
    #define cle(a,val) memset(a,(val),sizeof(a))
    #define rep(i,b) for(int i=0;i<(b);i++)
    #define dbg(x) cout <<#x<<" = "<<(x)<<endl
    #define PIar(a,n) rep(i,n)cout<<a[i]<<" ";cout<<endl;
    #define PIarr(a,n,m) rep(aa,n){rep(bb, m)cout<<a[aa][bb]<<" ";cout<<endl;}
    const double EPS= 1e-9 ;
    
    /*  /////////////////////////     C o d i n g  S p a c e     /////////////////////////  */
    
    map<char,int>mci;
    char s[10];
    int sol(int n)
    {
        int k=0;
        while(n>0)
        {
            s[k++]=n%10+'0';
            n/=10;
        }
        return k;
    }
    char biao[]={'0','1','2','3','4','5','6','7','8','9'};
    int main()
    {
        int o,n;
        scanf("%d",&o);
        while(o--)
        {
            mci.clear();
            scanf("%d",&n);
            for(int i=1;i<=n;i++)
            {
                cle(s,0);
                int k=sol(i);
                for(int j=0;j<k;j++)
                {
                    mci[s[j]]++;
                }
            }
            for(int i=0;i<10;i++)
            {
                printf("%d%c",mci[biao[i]],i==9?'
    ':' ');
            }
        }
        return 0;
    }
    

    UVA 455

    KMP大法好(PS:n-Next[n]不一定是最小循环节,只有当n%(n-Next[n])==0的时候,n-Next[n]才是最小循环节,当n-Next[n]!=0的时候,最小循环节是n >_< 又坑我半小时)

    #include <bits/stdc++.h>
    using namespace std;
    
    typedef long long ll;
    const int INF=0x3f3f3f3f;
    const ll LINF=0x3f3f3f3f3f3f3f3f;
    #define rep(i,b) for(int i=0;i<(b);i++)
    #define cle(a,val) memset(a,(val),sizeof(a))
    #define dbg(x) cout <<#x<<" = "<<(x)<<endl
    #define PIar(a,n) rep(i,n)cout<<a[i]<<" ";cout<<endl;
    #define PIarr(a,n,m) rep(aa,n){rep(bb, m)cout<<a[aa][bb]<<" ";cout<<endl;}
    const double EPS= 1e-9 ;
    
    /*  /////////////////////////     C o d i n g  S p a c e     /////////////////////////  */
    const int MAXN= 100 + 9 ;
    int Next[MAXN];
    int len;
    string x;
    void kmp_pre()
    {
        int i,j;
        j=Next[0]=-1;
        i=0;
        while(i<len)
        {
            while(-1!=j&&x[i]!=x[j])j=Next[j];
            Next[++i]=++j;
        }
    }
    
    int main()
    {
        int o;
        cin>>o;
        while(o--)
        {
            cin>>x;
            len=x.size();
            kmp_pre();
            int d=len-Next[len];
            if (len%d==0)
            printf("%d
    ",d);
            else printf("%d
    ",len);
            if (o!=0) puts("");
        }
        return 0;
    }
    

    UVA 227

    就是简单的模拟而已,但输入真的好特么麻烦 (⊙﹏⊙)

    #include <bits/stdc++.h>
    using namespace std;
    
    typedef long long ll;
    const int INF=0x3f3f3f3f;
    const ll LINF=0x3f3f3f3f3f3f3f3f;
    #define rep(i,b) for(int i=0;i<(b);i++)
    #define cle(a,val) memset(a,(val),sizeof(a))
    #define dbg(x) cout <<#x<<" = "<<(x)<<endl
    #define PIar(a,n) rep(i,n)cout<<a[i]<<" ";cout<<endl;
    #define PIarr(a,n,m) rep(aa,n){rep(bb, m)cout<<a[aa][bb]<<" ";cout<<endl;}
    const double EPS= 1e-9 ;
    
    /*  /////////////////////////     C o d i n g  S p a c e     /////////////////////////  */
    
    const int MAXN= 10000 + 9 ;
    
    char a[10][10];
    char ope[MAXN];
    int k=1;
    int main()
    {
        while(1)
        {
            gets(a[0]);
            if (a[0][0]=='Z') break;
            for(int i=1;i<5;i++)
            {
                gets(a[i]);
            }
            int cnt=0;
            while(scanf("%c",&ope[cnt])&&ope[cnt++]!='0') ;
            getchar();
            int x,y;
            rep(i,5)
            rep(j,5)
            if (a[i][j]==' ')
                x=i,y=j;
            bool out=0;
            for(int i=0;i<cnt;i++)
            {
                if (ope[i]=='A'){
                    if (x-1>=0)
                        swap(a[x][y],a[x-1][y]),x-=1;
                    else out=1;
                }
                if (ope[i]=='B'){
                    if (x+1<5)
                        swap(a[x][y],a[x+1][y]),x+=1;
                    else out=1;
                }
                if (ope[i]=='L'){
                    if (y-1>=0)
                        swap(a[x][y],a[x][y-1]),y-=1;
                    else out=1;
                }
                if (ope[i]=='R'){
                    if (y+1<5)
                        swap(a[x][y],a[x][y+1]),y+=1;
                    else out=1;
                }
            }
            if (k!=1)puts("");
            printf("Puzzle #%d:
    ",k++);
            if (out) puts("This puzzle has no final configuration.");
            else
            {
                rep(i,5)
                rep(j,5)
                printf("%c%c",a[i][j],j==4?'
    ':' ');
            }
        }
        return 0;
    }
    

    UVA 10340

    输出™的打错了,调了20分钟,我去,下把输出就只复制

    #include <bits/stdc++.h>
    using namespace std;
    
    #define PI(A) cout<<(A)<<endl
    #define rep(i,b) for(int i=0;i<(b);i++)
    const int MAXN= 100000 + 10000 ;
    char s[MAXN],t[MAXN];
    
    int main()
    {
        while(scanf("%s%s",s,t)!=EOF){
            int ls=strlen(s),lt=strlen(t),cnt=0;
            rep(i,lt)
            if (s[cnt]==t[i]&&cnt<ls) cnt++;
            if (cnt==ls) puts("Yes");
            else puts("No");
        }
        return 0;
    }
    

    UVA 1587

    这题真是坑死我了,不难的题,我却想了3小时,最后还是看别人代码才懂的,他说是长方体,那么正方体就是错的,只要根据长方体定义就好了,先判断6个面是不是两两相等,之后在看3个面是否有3条线相等,也就是是否能拼到一起

    #include <bits/stdc++.h>
    using namespace std;
    
    struct rec {
        int l, w;
    } r[6];
    bool cmp(rec a, rec b) {
        return a.w < b.w || (a.w == b.w && a.l < b.l);
    }
    
    int main() {
        while(~scanf("%d%d", &r[0].w, &r[0].l)) {
            bool ok = 1;
            if(r[0].w > r[0].l) swap(r[0].w, r[0].l);
            for(int i = 1; i < 6; i++) {
                scanf("%d%d", &r[i].w, &r[i].l);
                if (r[i].w > r[i].l) swap(r[i].w, r[i].l);
            }
            sort(r, r + 6, cmp);
            for(int i = 0; i < 6; i += 2)
                if (r[i].w != r[i + 1].w || r[i].l != r[i + 1].l) ok = 0;
            if (r[0].w != r[2].w || r[0].l != r[4].w || r[2].l != r[4].l) ok = 0;
            puts(ok ? "POSSIBLE" : "IMPOSSIBLE");
        }
        return 0;
    }
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  • 原文地址:https://www.cnblogs.com/s1124yy/p/5743116.html
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