N = gets.to_i

result = -1
queue = [{pos: 1, time: 1}]
check = Array.new(N+1, false)
check[1] = true

while queue.length > 0 do
  current = queue.shift
  if current[:pos] == N
    result = current[:time]
    break
  end
  move = current[:pos].to_s(2).count("1")
  if current[:pos] - move > 0 && !check[current[:pos] - move]
    queue << {pos: current[:pos] - move, time: current[:time] + 1}
    check[current[:pos] - move] = true
  end
  if current[:pos] + move <= N && !check[current[:pos] + move]
    queue << {pos: current[:pos] + move, time: current[:time] + 1}
    check[current[:pos] + move] = true
  end
end
p result