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

using i64 = long long;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    auto solve = [&]() {
        int n;
        cin >> n;

        cout << (n + 1) / 2 << '\n';
    };
    
    solve();
    
    return 0;
}