goal = int(input())

# goal_1bit_num = bin(goal)
# print(goal_1bit_num.count('1'))

stepped = set()
maybe_answers = set()


def step(position, count):
    if position in stepped:
        return
    else:
        stepped.add(position)

    if position not in range(1, goal + 1):
        return

    if len(maybe_answers) > 0 and count < min(maybe_answers):
        return

    if position == goal:
        maybe_answers.add(count)
        return

    position_bin = bin(position)
    step(position + position_bin.count('1'), count + 1)
    step(position - position_bin.count('1'), count + 1)


step(1, 1)

if len(maybe_answers) == 0:
    print('-1')
else:
    print(min(maybe_answers))