#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>
#include <set>
#include <cstdio>
#include <string>
#include <deque>

using namespace std;

int main() {
  int n;
  cin >> n;
  if (n % 2 == 0) {
    cout << n / 2 << endl;
  } else {
    cout << 1 << endl;
  }
  return 0;
}