Problem:
Score : 100 points

Problem Statement

You are given a three-digit positive integer N.

Determine whether N is a palindromic number.

Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

100≤N≤999

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Sample Input 1

575

Sample Output 1

Yes

N=575 is also 575 when read backward, so it is a palindromic number. You should print Yes.

Sample Input 2

123

Sample Output 2

No

N=123 becomes 321 when read backward, so it is not a palindromic number. You should print No.

Sample Input 3

812

Sample Output 3

No

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <iostream>
using namespace std;
typedef long long ll;

ll gcd(ll a, ll b) {
  return b != 0 ? gcd(b, a % b) : a;
}

int main(){
  int n,i;cin>>n;
  ll t,s,ans=1;
  for(i=0;i<n;++i){
    scanf("%lld",&t);
    s=gcd(t,ans);
    ans=ans/s*t;
  }
  cout<<ans<<endl;    
  return 0;
}