#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ll long long
#define mod 1000000007
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cout.tie(0);
    int N;
    cin>>N;
    cout<<(N+1)/2<<endl;
}