A_Raising_Bacteria.cpp

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n;
    cin >> n;

    int bitCnt = __builtin_popcount(n);
    cout << bitCnt << "\n";

    return 0;
}