#include<bits/stdc++.h> using namespace std; int main() { int a,b,sum=0; cin>>a; int a1=a; int a2=a; while(a1!=0) { a1/=10; sum++; } int sum1=0; for(int i=1; i<=sum; i++) { int n=a2%10; sum1+=n*pow(10,sum-i); a2/=10; } if(sum1==a) { cout<<"YES"; } else cout<<"NO"; return 0; }