#include<stdio.h>

int main(void)

{

unsigned x, y, result = 0;

scanf(“%u”, &x);

do {

y = x & 15;

x >>= 4;

if (y == 0 || y == 4 || y == 6 || y == 9 || y == 10 || y == 13){

result++;

}

if (y == 8 || y == 11){

result += 2;

}

} while (x);

printf(“%d”, result);

}