N = int(input())

checked = []
now = 1
l_flag = True

if(N == 1):
    print(0)
    l_flag = False

while l_flag:
    if(now in checked):
        print(-1)
        break
    checked.append(now)
    now_b = format(now, 'b')
    o_count = now_b.count('1')
    if((now + o_count) > N):
        now -= o_count
    elif((now + o_count) == N):
        checked.append(now + o_count)
        print(len(checked))
        break
    else:
        now += o_count