#include <stdio.h>
int countSetBits(unsigned int n) {
// Write your code here
unsigned int count = 0;
for(unsigned int i = 0;i<32;i++){
if((n&1) == 1){
count++;
}
n>>=1;
}
return count;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", countSetBits(n));
return 0;
}