#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  cin >> n;
  if (n == 1 || n == 2)
    cout << -1;
  else {
    if (n % 2 == 0)
      cout << (n * n) / 4 + 1 << " " << (n * n) / 4 - 1;
    else
      cout << ((n * n) - 1) / 2 << " " << ((n * n) + 1) / 2;
  }
  return 0;
}
