from collections import deque
N = int(input())
L=[]
[L.append([])for _ in range(N+1)]
PASS = [0]*(N+1)

for i in range(N+1):
    cnt = format(i, 'b').count('1')
    if i-cnt >=1:
        L[i].append(i-cnt)
    if i+cnt <=N:
        L[i].append(i+cnt)

q = deque()
qcnt = deque()
q.append(1)
qcnt.append(1)
while len(q) !=0:
    temp = q.popleft()
    cnt = qcnt.popleft()
    if temp ==N:
        print(cnt)
        exit()
    if PASS[temp]==0:
        PASS[temp]=1
        for a in L[temp]:
            q.append(a)
            qcnt.append(cnt+1)
print(-1)