#include<bits/stdc++.h>
#define ll long long
using namespace std;

int main(){
    string n,s;
    cin>>n;
    s=n;
    //meothinhle
    reverse(n.begin(),n.end());
    if (s==n)cout<<"YES";
    else cout<<"NO";
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin>>n;
	int a=n%10;
	n/=10;
	int b=n%10;
	n/=10;
	int c=n;
	if(a==c)cout<<"YES";
	else cout<<"NO";
	return 0;
}