#include <bits/stdc++.h>
#pragma GCC optimize("O3")
const long long MOD = 1e9 + 7;
using namespace std;
long long n_bits(long long n) {
  long long x = __builtin_popcount(n);
  return x;
}
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  cout.precision(0);
  cout << fixed;
  long long n, m, k, pt(0), ct(0), x, y;
  long long t = 1;
  cin >> n;
  cout << (n % 2) + (n / 2);
}
