懒得算.png

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