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