#include <bits/stdc++.h>
using namespace std;
int n;
int ans;
inline int read() {
  int x = 0, f = 1;
  char ch = getchar();
  while (ch > '9' || ch < '0') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    x = x * 10 + ch - '0';
    ch = getchar();
  }
  return x * f;
}
int main() {
  n = read();
  while (n) {
    if (n % 8 == 1) ans++;
    n /= 8;
  }
  cout << ans << endl;
  return 0;
}
