凯撒密码 题解

#include <bits/stdc++.h>
using namespace std;
int n;
string s;
int main(){
    cin>>n;
    cin>>s;
    for (int i=0;i<s.size();i++){
        if (s[i]+n>'z') s[i]+=n-26;
        else s[i]+=n;
    }
    cout<<s;
    return 0;
}