求关注😭o(╥﹏╥)o

#include <bits/stdc++.h>
using namespace std;
int main(){
    string a,b,c;
    cin>>a>>b>>c;
    int d = a[0]-b[0];
    d=(d%26+26)%26;
    for(int i = 0;i<c.size();i++){
        int cnt=(c[i]-'A'+d)%26;
        cout<<char(cnt+'A');
    }
    return 0;
}