#include<bits/stdc++.h> using namespace std; int main (){ /* int a,i,b; for(i=100;i<=999;i++){ d=i/100; f=i/10%10; g=i%10; if(d==f&d==g&f==g){ cout<<i<<" "; } } */ int n; cin>>n; int rn=0,a; a=n; while(a!=0){ rn=rn*10+a%10; a=a/10; } if(n==rn){ cout<<"YES"; }else{ cout<<"NO"; } return 0; }