INF = 10000000000

def sum_of_1 n
  sum = 0
  while n > 0 do
    sum += n % 2
    n /= 2
  end
  return sum
end

n = gets.to_i
if n === 1
  puts 1
  exit
end

dist = {}
(n+1).times {|i|
  dist[i] = INF
}

queue = Queue.new
queue.push(1)
dist[1] = 1

while true do
  if queue.size == 0
    break
  end
  val = queue.pop()
  diff = sum_of_1 val
  right = val + diff
  left = val - diff
  if right === n || left === n
    puts (dist[val] + 1)
    exit
  end
  if right < n && dist[right] == INF
    dist[right] = dist[val] + 1
    queue.push(right)
  end
  if left > 0 && dist[left] == INF
    dist[left] = dist[val] + 1
    queue.push(left)
  end
end

puts(-1)