string name="模拟代替大脑,暴力不用思考";

//合法数独:

#include <bits/stdc++.h>
using namespace std;
int a[10][10];
bool hang[10][10],lie[10][10],sd[10][10];
int over(){
	cout<<"No";
	return 0;
}
int main(){
	for (int i = 1;i <= 9;i++)
		for (int j = 1;j <= 9;j++)
			cin>>a[i][j];
	for (int i = 1;i <= 9;i++){
		for (int j = 1;j <= 9;j++){
			if (hang[i][a[i][j]]!=0)
				return over();
			else 
				hang[i][a[i][j]]=1;
		}
	}
	for (int i = 1;i <= 9;i++){
		for (int j = 1;j <= 9;j++){
			if (lie[j][a[i][j]]!=0)
				return over();
			else 
				lie[j][a[i][j]]=1;
		}
	}
	for (int i = 0;i < 9;i++){
		for (int j = 0;j < 9;j++){
			if (sd[i/3*3+j/3][a[i+1][j+1]]!=0)
				return over();
			else 
				sd[i/3*3+j/3][a[i+1][j+1]]=1;
		}
	}
	cout<<"Yes";
	return 0;
}

凯撒密码:

#include <bits/stdc++.h>
using namespace std;
int d;
char c,a[1010];
int main(){
	cin>>a;
	cin>>d;
	int y = strlen(a);
	for (int i = 0;i < y;i++){
		c=a[i];
		if (c >= '0' && c <= '9')
			cout<<(c+d-'0')%10;
		else if (c >= 'a' && c <= 'z')
			cout<<(char)((97+(c+d-'a')%26)-32);
		else 
			cout<<(char)('A'+(c+d-'A')%26);
	}
    return 0;
}