#include <iostream>
#include <iomanip>
#include <vector>
#include <math.h>
#include <queue>
#include <deque>
#include <map>
#include <set>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define all(a) a.begin(), a.end()
#define arr(a) a.rbegin(), a.rend()
using ll = long long;

//Konishii

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n; cin >> n;
    cout << (n + 1) / 2 << endl;
}