from collections import deque
N = int(input())
num = [-1]*N
seen = [False]*N
seen[0] = True
num[0] = 1
d = deque()
d.append(1)
while d:
    n = d.popleft()
    cnt = bin(n).count('1')
    a, b = n+cnt-1, n-cnt-1
    if 0<=a<N and seen[a] == False:
        seen[a] = True
        num[a] = num[n-1]+1
        d.append(a+1)
    if 0<=b<N and seen[b] == False:
        seen[b] = True
        num[b] = num[n-1]+1
        d.append(b+1)
print(num[-1])