N = int(input())
nvd = [True] * (N + 1)
nvd[1] = False
Q = {1}
cnt = 1

while Q:
    Q2 = set()
    for x in Q:
        if x == N:
            print(cnt)
            exit()
        y = bin(x).count("1")
        if x + y <= N and nvd[x + y]:
            nvd[x + y] = False
            Q2.add(x + y)
        if x - y > 0 and nvd[x - y]:
            nvd[x - y] = False
            Q2.add(x - y)
    Q = Q2
    cnt += 1
print(-1)