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

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define pii pair < int, int >
#define vi vector < int >

#define L(i, a, b) for (int i = (a); i <= (b); i++)
#define R(i, a, b) for (int i = (a); i >= (b); i--)
#define sz(a) ((int) a.size())
#define pb push_back
#define eb emplace_back
#define me(a, x) memset(a, x, sizeof(a))

void solve() {
	int n;
	cin >> n;
	cout << n / 2 + (n & 1) << '\n';
}

int main() {
//	freopen(".in", "r", stdin);
//	freopen(".out", "w", stdout);
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	int T = 1;
//	cin >> T;
	while (T--) solve();
}