#include <stdio.h>

int main(void){
	int n;
	int sum = 1;
	int cnt = 0;
	int res = 0;
	
	scanf("%d", &n);
	
	while(sum + res != n){
		if(sum * 2 <= n){
			sum *= 2;
		}else if(sum * 2 > n){
			while(n != sum * 2 + res){
				sum--;
				res++;
			}
			sum *= 2;
		}
		cnt++;
	}
	
	printf("%d", cnt);
}