N = int(input())
total = 1
now = 1

line = []
for i in range(1, N+1):
    b_num = '{0:b}'.format(i)
    c = 0
    for j in b_num:
        if j == "1":
            c += 1
    line.append(str(c))
    #print(c, b_num)
c = 1
while 1 :
    if now == N:
        print(c)
        break
    else:
        c += 1
        if int(line[now -1]) + now > N:
            if now - int(line[now -1]) <= 0:
                print(-1)
            else:
                now -= int(line[now -1])
                if str(now) in line[now-1]:
                    print(-1)
                    break

        else:
            now += int(line[now -1])