#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;
typedef pair<int, pair<int, int> > piii;
typedef long long ll;
const int N = 2000086, MOD = 998244353, INF = 0x3f3f3f3f;
ll res;
int n, m, cnt, w[N], v1, v2;



int main() {
    cin >> n;
    printf("%d\n", (n + 1) >> 1);
    return 0;
}