#include <iostream>
#include <cmath>
using namespace std;
int main() {
int N;
cin >> N;
cout << (int) sqrt(N) << sqrt(N);
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8Y21hdGg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpIHsKCWludCBOOwoJY2luID4+IE47Cgljb3V0IDw8IChpbnQpIHNxcnQoTikgPDwgc3FydChOKTsKfQ==