import sys

def count_one(num):
	count = 0
	bin_num = list(bin(num))
	for i in range(len(bin_num)):
		if(bin_num[i] == '1'):
			count += 1
			i += 1

	return count

def main():
	N = int(input())
	total = 1
	move_count = 1
	flag = False

	while(total != N):
		move = count_one(total)
		total += move
		if(total > N):

			if(flag == True):
				print(-1)
				sys.exit()

			total -= move * 2
			flag = True

		move_count += 1
	print(move_count)

if __name__ == '__main__':
	main()