N = int(input())
ans = N+1
q = [1]
c = 1
r = set([])
while c < ans and len(q) > 0:
    a = []
    for i in q:
        if i == N:
            ans = c
        elif (not i in r):
            r.add(i)
            n, m = i+bin(i).count('1'), i-bin(i).count('1')
            if n <= N : a += [n]
            if m > 0 : a += [m]
    q = a
    c += 1
print(ans if ans < N+1 else -1)