N = int(input())

checked = list(-1 for i in range(N + 1))
checked[0] = 0
move = list(map(bin, range(N)))
move = list(move[i].count('1') for i in range(N))
node = [0]
count = 1
pos = 1

def play():
    global count
    global pos
    checked[pos] = count
    def moving():
        global count
        global pos
        if pos + move[pos] <= N and checked[pos + move[pos]] == -1:
            pos += move[pos]
            count += 1
        else:
            pos = node.pop()
            count = checked[pos]
    if checked[pos - move[pos]] == -1:
        checked[pos - move[pos]] = count + 1
        node.append(pos - move[pos])
        moving()
    else:
        moving()

for i in range(N):
    if pos == N:
        print(count)
        break
    elif node == []:
        print(-1)
        break
    else:
        play()