n = gets.to_i

memo_array = Array.new(n, -1)
memo_array[0] = 1
current_cells = [0]
count = 2

while current_cells.length > 0
  next_cells = []
  current_cells.each do |cell|
    move_len = (cell + 1).to_s(2).count '1'
    back, forward = cell - move_len, cell + move_len

    if back > 0 and memo_array[back] == -1
      next_cells.push back
      memo_array[back] = count
    end
    if forward < n and memo_array[forward] == -1
      next_cells.push forward
      memo_array[forward] = count
    end
  end
  count += 1
  current_cells = next_cells
end

puts memo_array[n-1]