#include<iostream>
#include<iomanip>
#include<cmath>

// #include <algorithm>
using namespace std;
void Ahmed_Negm(){
  #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  #endif
}
int main()
{Ahmed_Negm();


long long n, rev;
cin>>n;
for(rev = 0; n > 0; n/10){
rev = (rev*10) + (n%10);
}

if(rev == n){
  cout<<rev<<"\nYES";
}else{
  cout<<rev<<"\nNO";
}



    return 0;
}