#include <iostream>
using namespace std;

int main()
{
    int N, k;
    do
    {
        cin>>N;
    }  while(N<1||N>1000000);

     int n, num, digit, rev = 0;

     cin >> num;

     n = num;

     do
     {
         digit = num % 10;
         rev = (rev * 10) + digit;
         num = num / 10;
     } while (num != 0);


     if (n == rev)
        cout<<N*N;

    return 0;
}