A_Raising_Bacteria.cpp

#include <bits/stdc++.h>
using namespace std;
#define int long long int
#define vi vector<int>
#define vc vector<char>
#define pyes cout << "YES";
#define pno cout << "NO";
#define ff() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define all(x) (x).begin(), (x).end()
#define mod (int)(1e9 + 7)
#define input(start, end, arr) { for(int i = start; i < end; ++i) cin >> arr[i]; }
#define f(i, x, n) for (int i = x; i < n; i++)
#define rf(i, x, n) for (int i = x; i >= n; i--)
#define sz(a) (int) a.size()
#define ppc __builtin_popcount
#define ppcll __builtin_popcountll
#define pi (3.141592653589)
#define INF 1e18
#define nl '\n'
//------------------------------------------------------------------------------------------------------------------
int mod_add(int a, int b, int m) {a = a % m; b = b % m; return (((a + b) % m) + m) % m;}
int mod_mul(int a, int b, int m) {a = a % m; b = b % m; return (((a * b) % m) + m) % m;}
int mod_sub(int a, int b, int m) {a = a % m; b = b % m; return (((a - b) % m) + m) % m;}

int32_t main(){
    ff();
    int n;
    cin>>n;
    int cnt = 0;
    for(int i=0; i < 32; i++){
        if((n & (1 << i) ))cnt++;
    }
    cout<<cnt;
}