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

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int t = 1;
	//cin >> t;
	while (t--)
{
    int n,x=0;cin>>n;
    cout<<ceil(n/2.0)<<'\n';
}
	return 0;
}