#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int t=n;
    int y=0;
    while(n!=0)
    {
        int ge=n%10;
        y*=10;
        y+=ge;
        n/=10;
    }
    if(y==t)
    {
        cout<<"YES";
    }
    else
    {
        cout<<"NO";
    }
    return 0;
}