#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  string digits[16] = {"0", "1", "2", "3", "4", "5", "6", "7",
                       "8", "9", "A", "B", "C", "D", "E", "F"};
  int dec;
  int k = 0;
  cin >> dec;
  string snum;
  do {
    snum.insert(0, digits[dec % 16]);
    dec /= 16;
  } while (dec != 0);
  for (int i = 0; i < snum.size(); ++i) {
    if (snum[i] == '0') k++;
    if (snum[i] == '4') k++;
    if (snum[i] == '6') k++;
    if (snum[i] == '8') k = k + 2;
    if (snum[i] == '9') k++;
    if (snum[i] == 'A') k++;
    if (snum[i] == 'B') k = k + 2;
    if (snum[i] == 'D') k++;
  }
  cout << k << endl;
}
