#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e7 + 10;

int main() {
	int n;
	for (int i = 1; cin >> n; i++) {
		if (n <= 0 || n == 0) {
			break;
		}
		else {
			cout << n / 2 << endl;
		}
	}
	return 0;
}
// 3 / 2 == 1, 10 / 2 == 5, 81 / 2 == 40.