Submission #17259277

---

Source Code Expand

defmodule Main do
  def main do
    [n, k] =
      IO.read(:line) |> String.trim() |> String.split(" ") |> Enum.map(&String.to_integer/1)

    solve(n, k)
    |> IO.puts()
  end

  @doc ~S"""
  https://atcoder.jp/contests/abc161/tasks/abc161_c

  ## Examples

      iex> Abc161C.solve(7, 4)
      1
      iex> Abc161C.solve(2, 6)
      2
      iex> Abc161C.solve(1000000000000000000, 1)
      0

  """
  def solve(n, k) when rem(n, k) == 0, do: 0

  def solve(n, k) do
    [abs(n), abs(n - div(n, k) * k), abs(n - div(n, k) * k - k)]
    |> Enum.min()
  end
end

Submission Info

Judge Result