#include<iostream>
using namespace std;
int main()
{
int n;
cin>>n;
int m=0;
while(n)
{
m+=n%2; //只有1才会加到m里,0加了也白加
n/=2;
}
cout<<m;
}
using namespace std;
int main()
{
int n;
cin>>n;
int m=0;
while(n)
{
m+=n%2; //只有1才会加到m里,0加了也白加
n/=2;
}
cout<<m;
}