题解

#include<iostream>
#include<string>
using namespace std;
int main(){
	string s,s2;
	cin>>s;
	for(int i=s.size()-1;i>=0;i--){
		s2+=s[i];
	}
	if(s==s2){
		cout<<"yes";
	}else{
		cout<< "no";
	}
	return 0;
}