N = int(input())
queue = [1]
visited = set()
count = 0
while queue:
    count += 1
    n = []
    flg = False
    for i in queue:
        if i == N:
            print(count)
            flg = True
            break
        b1_num = bin(i).count('1')
        a = i + b1_num
        b = i - b1_num
        if a <= N and a not in visited:
            visited.add(a)
            n.append(a)
        if 1 < b and b not in visited:
            visited.add(b)
            n.append(b)
    queue = n
    if(flg):
        break
else:
    print(-1)