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#include <bits/stdc++.h>
using namespace std;
#pragma comment(linker, "/STACK:102400000,102400000")
long long mul(long long a, long long b) { return (a * b) % (1000000007); }
long long add(long long a, long long b) { return (a + b) % (1000000007); }
long long sub(long long a, long long b) {
  return ((a - b) % (1000000007) + (1000000007)) % (1000000007);
}
void upd(long long &a, long long b) {
  a = (a % (1000000007) + b % (1000000007)) % (1000000007);
}
int read() {
  int x = 0, f = 1;
  char ch = getchar();
  while (!isdigit(ch)) {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (isdigit(ch)) {
    x = x * 10 + ch - '0';
    ch = getchar();
  }
  return x * f;
}
int main() {
  long long n;
  cin >> n;
  char s[10000];
  int h[10000];
  sprintf(s, "%x", n);
  int ans = 0;
  h['0'] = 1;
  h['4'] = 1;
  h['6'] = 1;
  h['9'] = 1;
  h['8'] = 2;
  h['a'] = 1;
  h['d'] = 1;
  h['b'] = 2;
  for (int i = 0; i < strlen(s); i++) {
    ans += h[s[i]];
  }
  cout << ans << endl;
  return 0;
}
