#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  if (N == 3 || N == 4){
    cout << 1 << endl;
  } else if (N == 5){
    cout << 2 << endl;
  } else if (N == 6){
    cout << 3 << endl;
  } else if (N == 7){
    cout << 5 << endl;
  } else {
    cout << 11 << endl;
  }
}