#include <iostream>
using namespace std;

int main() {
	
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	long long N;
	cin >> N;
	
	long long ban_dau = N;
	long long dao_nguoc = 0;
	
	while (N > 0) {
		
		long long chu_so_cuoi = N % 10;
		long long dao_nguoc = dao_nguoc * 10 + chu_so_cuoi;
		
		N = N / 10;
	}
	
	if (ban_dau == dao_nguoc) {
		cout << "YES";
	}
	else {
		cout << "NO";
	}
	return 0;
}