题解 | 凯撒加密

#include <iostream>
#include<vector>
using namespace std;

int main() {
    int a;
    string s;
    cin>>a>>s;
    vector<char>b;
    for(char i:s){
        i='a'+(i-'a'+a)%26;
        b.push_back(i);
    } 
    for(char i:b)cout<<i;
}