題目連結

A:

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <algorithm>
using namespace std;
const int maxn = 110;
char str[maxn];
int main(){
    scanf("%s",str);
    int len = strlen(str);
    int
 
 i,j;
    int zero = 0, one = 0;
    for(i = len - 1; i>=0; i--){
        if(str[i] == '0'){
            ++zero;
        }
        if(zero >= 6 && str[i] == '1'){
            ++one;
        }
    }
    if(one){
        printf("yes\n");
    }else{
        printf("no\n");
    }
    return 0;
}
 

B:

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <algorithm>
using namespace std;
int n;
int num[5][20];
bool vis[1010];
int jyun[1010][10],tot;
int now[10];
void dfs(int index,int p, int sum){
    vis[sum] = true
 
;
    if(p>n){
        //cout<<sum<<endl;
        return;
    }
    int i,j;
    for(i=1;i<=6;i++){
        //cout<<"test "<<jyun[index][p]<<endl;
        dfs(index, p+1, sum + num[jyun[index][p]][i] * pow(10, p-1));
    }
}
bool go[10];
void killme(int p){
    int i,j;
    if(p > n){
        ++tot;
        for(i=1;i<=n;i++){
            jyun[tot][i] = now[i];
        }
        return;
    }
    for(i=1;i<=n;i++){
        if(go[i]){
            now[p] = i;
            go[i] = false;
            killme(p+1);
            go[i] = true;
        }
    }
}
void solve(){
    tot = 0;
    killme(1);
    int i;
    for(i=1;i<=tot;i++){
        dfs(i, 1, 0);
    }
}
int main(){
    int i,j,a;
    while(~scanf("%d",&n)){
        memset(vis, false, sizeof(false));
        memset(go, true, sizeof(go));
        for(i=1;i<=n;i++){
            for(j=1;j<=6;j++){
                scanf("%d",&num[i][j]);
            }
        }
        solve();
        for(i=0;i<1000;i++){
            if(!vis[i]){
                printf("%d\n",i-1);
                break;
            }
        }
    }

    return 0;
}

C:

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <algorithm>
using namespace std;
int save[50];
bool same(int a, int b, int c, int d){
    if(save[a]==save[b]&&save[b]==save[c]&&save[c]==save[d]){
        return true;
    }else{
        return false;
    }
}
int main(){
    int i;
    for(i=1;i<=24;i++){
        scanf("%d",save+i);
    }
    bool flag = false;
    if(same(13,14,15,16) && same(17,18,19,20)){//right & left
        if(same(1,3,6,8) && same(5,7,10,12) && same(2,4,22,24) && same(9,11,21,23)){
            flag = true;
        }
        if(same(6,8,9,11) && same(2,4,5,7) && same(10,12,22,24) && same(1,3,21,23)){
            flag = true;
        }
    }else if(same(5,6,7,8) && same(21,22,23,24)){//front & back
        if(same(3,4,18,20) && same(11,12,17,19) && same(9,10,13,15) && same(1,2,14,16)){
            flag = true;
        }
        if(same(3,4,13,15) && same(14,16,11,12) && same(9,10,18,20) && same(1,2,17,19)){
            flag = true;
        }
    }else if(same(1,2,3,4) && same(9,10,11,12)){//up & down
        if(same(5,6,19,20) && same(17,18,23,24) && same(21,22,15,16) && same(13,14,7,8)){
            flag = true;
        }
        if(same(5,6,15,16) && same(13,14,23,24) && same(21,22,19,20) && same(7,8,17,18)){
            flag = true;
        }
    }
    if(flag){
        printf("YES\n");
    }else{
        printf("NO\n");
    }
    return 0;
}