#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const int mod=1004535809;

int main(){
  ull n;
  cin>>n;
  string s;
  while(n>0){
    int a;
    a=n%2;
    string b;
    b=to_string(a);
    s+=b;
    n/=2;
  }
  reverse(s.begin(),s.end());

  bitset<128> bs(s);
  cout<<bs.count()<<endl;
  return 0;
}