有点难，但不多

#include<iostream>
using namespace std;

bool pail(int n)
{
    int x = n,b = 0;
    while(x){
        b = b*10 + x%10;
        x /= 10;
    }
    return b == n;
}
int main()
{
    int x;
    cin >> x;
    if(pail(x))cout << "Yes";
    else cout << "No";
    return 0;
}