[BOJ] 1259 - 팰린드롬수

#include<iostream>

using namespace std;

int main(){
    string input;
    while(true){
        cin >> input;

        if(input == "0") break;

        bool flag = true;

        for(int i = 0; i < input.length() / 2; i++){
            if(input[i] != input[input.length() - i - 1]){
                flag = false;
                break;
            }
        }
        if(flag) cout << "yes" << endl;
        else cout << "no" << endl;
    }
}