#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; if(n<0) { cout<<"-"; n=n*-1; } int r=0; while(n!=0) { int yu=n%10; r=r*10+yu; n/=10; } if(n==r){ cout<<"YES"; }else{ cout<<"NO"; } return 0; }