#include<bits/stdc++.h>
  using namespace std;
   int main ()
   {
    unsigned long long n;
      while (cin>>n) {
      int ans = 0;
        while (n) {
        if (n % 2 == 1) ans++;
        n /= 2;
                   }
       printf("%d\n", ans);
         }

        return 0;
   }