#include<bits/stdc++.h>

using namespace std;

void __init__(){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0); 
	srand(time(NULL));
}

void solve(){
	int n; cin>> n;
	
	cout<< (n + 1) / 2;
}
	
int main() {
	__init__();
	
	//int t; cin>> t;
	int t = 1;
	int now = 1;
	
	while(t--){
		//cout<< "Case #"<<now<< ": Katya's place can be ";
		now++;
		solve();
	}	
}