#include <bits/stdc++.h>
using namespace std;
map<string, int> mp;
int ans;
int main() {
  long long n;
  cin >> n;
  if (n < 3)
    cout << -1 << endl;
  else if (n % 2 == 0) {
    cout << n * n / 4 - 1 << " " << n * n / 4 + 1 << endl;
  } else {
    cout << (n * n - 1) / 2 << " " << (n * n + 1) / 2 << endl;
  }
}
