#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n == 1) {
    cout << 1 << endl;
    return 0;
  }
  if (n % 2 == 0)
    cout << n / 2 << endl;
  else
    cout << n / 2 + 1 << endl;
  return 0;
}
