#include <cstdio>
int main(){
int num, cnt, sh, yu;
while(EOF != scanf("%d", &num)){
cnt = 0;
while(num != 0){
sh = num / 2;
yu = num - sh * 2;
num = sh;
if(yu == 1){
cnt++;
}
}
printf("%d\n", cnt);
}
return 0;
}

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