题解

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char a[110];
    int n;
    cin>>n>>a;
    for(int i=0;i<strlen(a);i++){
        if(a[i]+n%26<='z'){
            a[i]+=n%26;
            cout<<a[i];
        }else{
      	  a[i]+=n%26;
      	  a[i]-=26;
     	  cout<<a[i];
        }
    }
    return 0;
}

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