#include <bits/stdc++.h>
using namespace std;

static inline void solve() {
  int n;
  cin >> n;
  int ans = 1;
  if (n % 2 == 0) {
    ans = n / 2;
  }
  cout << ans << '\n';
}

int main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
#ifdef LOCAL
  int T;
  cin >> T;
  for (int tc = 1; tc <= T; tc++) {
    cout << "Case" << tc << ":" << '\n';
    solve();
  }
#else
  solve();
#endif
  return 0;
}