浅浅地发一下

#include<bits/stdc++.h>
using namespace std;
string s,b; 
int main(){
	cin>>s;
	int len=s.size();
	for(int i=len-1;i>=0;i--){
		if(s[i]=='x'||s[i]=='y'||s[i]=='z'||s[i]=='X'||s[i]=='Y'||s[i]=='Z'){
			if(s[i]>=97&&s[i]<=122){
				b+=(char)(s[i]+3-26-(97-65));
			}
			else{
				b+=(char)(s[i]+3-26+(97-65));
			}
		}
		else{
			
			if(s[i]>=97&&s[i]<=122){
				b+=(char)(s[i]+3-(97-65));
			}
			else{
				b+=(char)(s[i]+3+(97-65));
			}
		}
	}
	cout<<b;
	return 0;
}