WA,玄关求条

#include <bits/stdc++.h>
using namespace std;
#define int long long int
signed main(){
    string s;
    getline(cin,s);
    for (int i=0;i<s.size();i++){
        if (s[i]=='z'||s[i]=='Z'||s[i]=='X'||s[i]=='x'||s[i]=='Y'||s[i]=='y'){
            if (s[i]=='z'){
                s[i]='c';
            }
            if (s[i]=='Z'){
                s[i]='C';
            }
            if (s[i]=='Y'){
                s[i]='B';
            }
            if (s[i]=='y'){
                s[i]='b';
            }
            if (s[i]=='x'){
                s[i]='a';
            }
            if (s[i]=='X'){
                s[i]='A';
            }
            goto luogu;
        }
        s[i]=char(s[i]+3);
        luogu:
    }
    for (int i=(s.size()-1);i>=0;i--){
        if (s[i]>='a'&&s[i]<='z'){
            s[i]-=(char)32;
        }
        if (s[i]>='A'&&s[i]<='Z'){
            s[i]+=(char)32;
        }
        cout<<s[i];
    }
    return 0;
}