题解

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