from collections import deque
def bfsp(i,k):
    if i+k <= N:
        if box[i+k] > 0:
            box[i+k] = min(box[i] + 1, box[i+k])
        else:
            box[i+k] = box[i] + 1
            q.append(i+k)


def bfsm(i,k):
    if i-k >= 1:
        if box[i-k] > 0:
            box[i-k] = min(box[i] + 1, box[i-k])
        else:
            box[i-k] = box[i] + 1
            q.append(i-k)

N = int(input())
box = [0 for _ in range(N+1)]
box[1] = 1
q = deque()
q.append(1)
while len(q) > 0:
    i = q.popleft()
    if box[i] <= 0:
        q.append(i+1)
        continue
    s = bin(i)
    k = s.count("1")
    bfsp(i,k)
    bfsm(i,k)
if box[N] > 0:
    print(box[N])
else:
    print(-1)