#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 == 1)
      cout << (n * n - 1) / 2 << " " << (n * n + 1) / 2;
    else
      cout << (n * n - 4) / 4 << " " << (n * n + 4) / 4;
  }
  return 0;
}
