#include <stdio.h>
int countSetBits(unsigned int n) {
// Write your code here
unsigned int Count = 0 ;
unsigned int Result = 0 ;
for (unsigned int Counter = 0 ; Counter < (sizeof(unsigned int)*8);Counter++)
{
Result= ((n>>Counter)&0x01);
if(Result==1)
{
Count++;
}
}
return Count;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", countSetBits(n));
return 0;
}