#include <bits/stdc++.h>
char x[10];
int main() {
  int a, d = 0, ans = 0;
  ;
  std::cin >> a;
  if (a == 0) return std::cout << '1', 0;
  while (a) {
    int t = (a & 15);
    if (t < 10)
      x[++d] = t + '0';
    else
      x[++d] = t - 10 + 'A';
    a >>= 4;
  }
  for (int i = 1; i <= d; ++i) {
    if (x[i] == '0' || x[i] == '4' || x[i] == '6' || x[i] == '9' ||
        x[i] == 'A' || x[i] == 'D')
      ++ans;
    if (x[i] == '8' || x[i] == 'B') ans += 2;
  }
  std::cout << ans;
  return 0;
}
