#include <bits/stdc++.h>
int main(void) {
  unsigned x, y, result = 0;
  scanf("%u", &x);
  do {
    y = x & 15;
    x >>= 4;
    if (y == 0 || y == 4 || y == 6 || y == 9 || y == 10 || y == 13) {
      result++;
    }
    if (y == 8 || y == 11) {
      result += 2;
    }
  } while (x);
  printf("%d", result);
}
