#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)

int main() {
    int n; 
    cin >> n;

    int ans;
    if (n % 2 == 0) {
        ans = n / 2;
    } else {
        ans = 1;
    }

    cout << ans << endl;

    return 0;
}