#include <bits/stdc++.h>
using namespace std;
const int N6 = 1e6 + 6, N3 = 1e3 + 6, oo = 1e9 + 9, base = 1e9 + 7;
const long long ool = 1e18 + 9;
int main() {
  ios_base ::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  cout << (n % 7 == 6 ? n / 7 * 2 + 1 : n / 7 * 2) << " "
       << (n % 7 == 1 ? n / 7 * 2 + 1 : (n + 6) / 7 * 2);
  return 0;
}
