#687444 (Crystal) No.217 魔方陣を作ろう

提出ソース
結果

問題	No.217 魔方陣を作ろう
ユーザー	yuruhiya
提出日時	2021-08-08 12:05:44
言語	Crystal (1.11.2)
結果	AC
実行時間	2 ms / 5,000 ms
コード長	14,224 bytes
コンパイル時間	11,429 ms
コンパイル使用メモリ	296,036 KB
実行使用メモリ	5,376 KB
最終ジャッジ日時	2024-09-19 07:37:10
合計ジャッジ時間	11,810 ms
ジャッジサーバーID （参考情報）	judge3 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力	結果	実行時間実行使用メモリ
testcase_00	AC	2 ms 5,248 KB
testcase_01	AC	1 ms 5,248 KB
testcase_02	AC	2 ms 5,376 KB
testcase_03	AC	1 ms 5,376 KB
testcase_04	AC	1 ms 5,376 KB
testcase_05	AC	2 ms 5,376 KB
testcase_06	AC	2 ms 5,376 KB
testcase_07	AC	1 ms 5,376 KB
testcase_08	AC	2 ms 5,376 KB
testcase_09	AC	1 ms 5,376 KB
testcase_10	AC	2 ms 5,376 KB
testcase_11	AC	1 ms 5,376 KB
testcase_12	AC	1 ms 5,376 KB
testcase_13	AC	1 ms 5,376 KB
testcase_14	AC	2 ms 5,376 KB
testcase_15	AC	1 ms 5,376 KB
testcase_16	AC	2 ms 5,376 KB
testcase_17	AC	2 ms 5,376 KB
権限があれば一括ダウンロードができます
ソースコード

raw source code
# require "/template"
# require "./scanner"
# ### Specifications
#
# ```plain
# Inside input macro                            | Expanded code
# ----------------------------------------------+---------------------------------------
# Uppercase string: Int32, Int64, Float64, etc. | {}.new(Scanner.s)
# s                                             | Scanner.s
# c                                             | Scanner.c
# Other lowercase string: i, i64, f, etc.       | Scanner.s.to_{}
# operator[]: type[size]                        | Array.new(input(size)) { input(type) }
# Tuple literal: {t1, t2, t3}                   | {input(t1), input(t2), input(t3)}
# Array literal: [t1, t2, t3]                   | [input(t1), input(t2), input(t3)]
# Range literal: t1..t2                         | input(t1)..input(t2)
# If: cond ? t1 : t2                            | cond ? input(t1) : input(t2)
# Assign: target = value                        | target = input(value)
# ```
#
# ### Examples
#
# Input:
# ```plain
# 5 3
# foo bar
# 1 2 3 4 5
# ```
# ```
# n, m = input(Int32, Int64) # => {5, 10i64}
# input(String, Char[m])     # => {"foo", ['b', 'a', 'r']}
# input(Int32[n])            # => [1, 2, 3, 4, 5]
# ```
# ```
# n, m = input(i, i64) # => {5, 10i64}
# input(s, c[m])       # => {"foo", ['b', 'a', 'r']}
# input(i[n])          # => [1, 2, 3, 4, 5]
# ```
#
# Input:
# ```plain
# 2 3
# 1 2 3
# 4 5 6
# ```
#
# ```
# h, w = input(i, i) # => {2, 3}
# input(i[h, w])     # => [[1, 2, 3], [4, 5, 6]]
# ```
# ```
# input(i[i][i]) # => [[1, 2, 3], [4, 5, 6]]
# ```
#
# Input:
# ```plain
# 5 3
# 3 1 4 2 5
# 1 2
# 2 3
# 3 1
# ```
# ```
# n, m = input(i, i)       # => {5, 3}
# input(i.pred[n])         # => [2, 0, 3, 1, 4]
# input({i - 1, i - 1}[m]) # => [{0, 1}, {1, 2}, {2, 0}]
# ```
#
# Input:
# ```plain
# 3
# 1 2
# 2 2
# 3 2
# ```
# ```
# input({tmp = i, tmp == 1 ? i : i.pred}[i]) # => [{1, 2}, {2, 1}, {3, 1}]
# ```
#
# Input:
# ```plain
# 3
# 1 2
# 2 3
# 3 1
# ```
# ```
# n = input(i)
# input_column({Int32, Int32}, n) # => {[1, 2, 3], [2, 3, 1]}
# ```
class Scanner
  private def self.skip_to_not_space
    peek = STDIN.peek
    not_space = peek.index { |x| x != 32 && x != 10 } || peek.size
    STDIN.skip(not_space)
  end

  def self.c
    skip_to_not_space
    STDIN.read_char.not_nil!
  end

  def self.s
    skip_to_not_space

    peek = STDIN.peek
    if index = peek.index { |x| x == 32 || x == 10 }
      STDIN.skip(index + 1)
      return String.new(peek[0, index])
    end

    String.build do |buffer|
      loop do
        buffer.write peek
        STDIN.skip(peek.size)
        peek = STDIN.peek
        break if peek.empty?
        if index = peek.index { |x| x == 32 || x == 10 }
          buffer.write peek[0, index]
          STDIN.skip(index)
          break
        end
      end
    end
  end
end

macro internal_input(type, else_ast)
  {% if Scanner.class.has_method?(type.id) %}
    Scanner.{{type.id}}
  {% elsif type.stringify == "String" %}
    Scanner.s
  {% elsif type.stringify == "Char" %}
    Scanner.c
  {% elsif type.stringify =~ /[A-Z][a-z0-9_]*/ %}
    {{type.id}}.new(Scanner.s)
  {% elsif String.has_method?("to_#{type}".id) %}
    Scanner.s.to_{{type.id}}
  {% else %}
    {{else_ast}}
  {% end %}
end

macro internal_input_array(type, args)
  {% for i in 0...args.size %}
    %size{i} = input({{args[i]}})
  {% end %}
  {% begin %}
    {% for i in 0...args.size %} Array.new(%size{i}) { {% end %}
      input({{type.id}})
    {% for i in 0...args.size %} } {% end %}
  {% end %}
end

macro input(type)
  {% if type.is_a?(Call) %}
    {% if type.receiver.is_a?(Nop) %}
      internal_input(
        {{type.name}}, {{type.name}}(
          {% for argument in type.args %} input({{argument}}), {% end %}
        )
      )
    {% elsif type.name.stringify == "[]" %}
      internal_input_array({{type.receiver}}, {{type.args}})
    {% else %}
      input({{type.receiver}}).{{type.name.id}}(
        {% for argument in type.args %} input({{argument}}), {% end %}
      ) {{type.block}}
    {% end %}
  {% elsif type.is_a?(TupleLiteral) %}
    { {% for i in 0...type.size %} input({{type[i]}}), {% end %} }
  {% elsif type.is_a?(ArrayLiteral) %}
    [ {% for i in 0...type.size %} input({{type[i]}}), {% end %} ]
  {% elsif type.is_a?(RangeLiteral) %}
    Range.new(input({{type.begin}}), input({{type.end}}), {{type.excludes_end?}})
  {% elsif type.is_a?(If) %}
    {{type.cond}} ? input({{type.then}}) : input({{type.else}})
  {% elsif type.is_a?(Assign) %}
    {{type.target}} = input({{type.value}})
  {% else %}
    internal_input({{type.id}}, {{type.id}})
  {% end %}
end

macro input(*types)
  { {% for type in types %} input({{type}}), {% end %} }
end

macro input_column(types, size)
  {% for type, i in types %}
    %array{i} = Array({{type}}).new({{size}})
  {% end %}
  {{size}}.times do
    {% for type, i in types %}
      %array{i} << input({{type}})
    {% end %}
  end
  { {% for type, i in types %} %array{i}, {% end %} }
end

# require "./tuple/times"
struct Tuple
  def times(&block) : Nil
    {% begin %}
      {% for i in 0...@type.size %}
        {% if @type[i].has_method?(:each) %}
          self[{{i}}].each do |i{{i}}|
        {% else %}
          self[{{i}}].times do |i{{i}}|
        {% end %}
      {% end %}
      yield({% for i in 0...@type.size %} i{{i}}, {% end %})
      {% for i in 0...@type.size %} end {% end %}
    {% end %}
  end

  private class TimesIterator(T)
    include Iterator(T)

    def initialize(@n : T)
      tuple = {% begin %}
                { {% for i in 0...T.size %} T[{{i}}].zero, {% end %} }
              {% end %}
      @index = tuple.as(T)
      @first = true
    end

    def next
      if @first
        @first = false
        return @index
      end
      {% begin %}
        {%
          type = @type.type_vars[0]
          size = type.size
        %}
        {% for i in 1..size %}
          if @index[{{size - i}}] < @n[{{size - i}}] - 1
            @index = {
              {% for j in 0...size %}
                {% if j < size - i %}
                  @index[{{j}}],
                {% elsif j == size - i %}
                  @index[{{j}}] + 1,
                {% else %}
                  {{type[j]}}.zero,
                {% end %}
              {% end %}
            }
            return @index
          end
        {% end %}
        stop
      {% end %}
    end
  end

  def times
    TimesIterator(self).new(self)
  end
end

# require "./comparable/min_max"
module Comparable(T)
  def min(x : T)
    self > x ? x : self
  end

  def max(x : T)
    self < x ? x : self
  end
end

# require "./array/new"
class Array
  def self.new(sizes : Tuple(*T), initial_value) forall T
    {% begin %}
      {% for i in 0...T.size %} Array.new(sizes[{{i}}]) { {% end %}
      initial_value
      {% for i in 0...T.size %} } {% end %}
    {% end %}
  end

  def self.new(sizes : Tuple(*T), &block) forall T
    {% begin %}
      {% for i in 0...T.size %} Array.new(sizes[{{i}}]) { |index{{i}}| {% end %}
      yield({% for i in 0...T.size %} index{{i}}, {% end %})
      {% for i in 0...T.size %} } {% end %}
    {% end %}
  end
end

# require "./array/change"
class Array(T)
  def chmin(i : Int, value : T)
    (self[i] > value).tap do |f|
      self[i] = value if f
    end
  end

  protected def chmin(i : Int, *indexes, value)
    self[i].chmin(*indexes, value: value)
  end

  def chmin(indexes : Tuple, value)
    chmin(*indexes, value: value)
  end

  def chmax(i : Int, value : T)
    (self[i] < value).tap do |f|
      self[i] = value if f
    end
  end

  protected def chmax(i : Int, *indexes, value)
    self[i].chmax(*indexes, value: value)
  end

  def chmax(indexes : Tuple, value)
    chmax(*indexes, value: value)
  end
end

# require "/point"
struct Point
  include Comparable(Point)
  extend Indexable(Point)

  property y : Int32, x : Int32

  Direction4 = [Point.up, Point.left, Point.down, Point.right]
  Direction8 = Direction4 + [Point.ul, Point.ur, Point.dl, Point.dr]

  class_getter! height : Int32, width : Int32

  def self.set_range(height : Int32, width : Int32)
    raise ArgumentError.new unless 0 < height && 0 < width
    @@height, @@width = height, width
  end

  def self.size
    height * width
  end

  def self.unsafe_fetch(index : Int)
    Point.new(index // Point.width, index % Point.width)
  end

  def self.each(h : Int, w : Int, &block)
    h.times do |y|
      w.times do |x|
        yield Point[y, x]
      end
    end
  end

  def self.each(y : Int, w : Int)
    size.times.map { |i| Point.new(i) }
  end

  def initialize
    @y, @x = 0, 0
  end

  def initialize(@y : Int32, @x : Int32)
  end

  def initialize(i : Int32)
    raise ArgumentError.new unless 0 <= i && i < Point.size
    @y, @x = i // Point.width, i % Point.width
  end

  def self.from(array : Array(Int32)) : self
    raise ArgumentError.new unless array.size == 2
    Point.new(array.unsafe_fetch(0), array.unsafe_fetch(1))
  end

  def self.[](y : Int32, x : Int32) : self
    Point.new(y, x)
  end

  private macro define_direction(name, dy, dx)
    def self.{{name}}
      Point.new({{dy}}, {{dx}})
    end

    def {{name}}
      Point.new(y + {{dy}}, x + {{dx}})
    end

    def {{name}}!
      @y += {{dy}}
      @x += {{dx}}
      self
    end
  end

  define_direction(zero, 0, 0)
  define_direction(up, -1, 0)
  define_direction(left, 0, -1)
  define_direction(down, 1, 0)
  define_direction(right, 0, 1)
  define_direction(ul, -1, -1)
  define_direction(ur, -1, 1)
  define_direction(dl, 1, -1)
  define_direction(dr, 1, 1)

  {% for op in %w[+ - * // %] %}
    def {{op.id}}(other : Point)
      Point.new(y {{op.id}} other.y, x {{op.id}} other.x)
    end

    def {{op.id}}(other : Int32)
      Point.new(y {{op.id}} other, x {{op.id}} other)
    end
  {% end %}

  def xy
    Point.new(x, y)
  end

  def yx
    self
  end

  def ==(other : Point)
    x == other.x && y == other.y
  end

  def <=>(other : Point)
    to_i <=> other.to_i
  end

  def [](i : Int32)
    return y if i == 0
    return x if i == 1
    raise IndexError.new
  end

  def succ
    raise IndexError.new unless in_range? && self != Point.last
    if x < Point.width - 1
      Point.new(y, x + 1)
    else
      Point.new(y + 1, 0)
    end
  end

  def pred
    raise IndexError.new unless in_range? && self != Point.first
    if x > 0
      Point.new(y, x - 1)
    else
      Point.new(y - 1, Point.width - 1)
    end
  end

  def in_range?
    (0...Point.height).includes?(y) && (0...Point.width).includes?(x)
  end

  def to_i : Int32
    raise IndexError.new unless in_range?
    y * Point.width + x
  end

  def distance_square(other : Point)
    (y - other.y) ** 2 + (x - other.x) ** 2
  end

  def distance(other : Point)
    Math.sqrt(distance_square(other))
  end

  def manhattan(other : Point)
    (y - other.y).abs + (x - other.x).abs
  end

  def chebyshev(other : Point)
    Math.max((y - other.y).abs, (x - other.x).abs)
  end

  {% for i in [4, 8] %}
    def adjacent{{i}}(&block) : Nil
      Direction{{i}}.each do |d|
        yield self + d
      end
    end

    def adjacent{{i}}
      Direction{{i}}.each.map { |p| self + p }
    end

    def adj{{i}}_in_range(&block) : Nil
      Direction{{i}}.each do |d|
        point = self + d
        yield point if point.in_range?
      end
    end

    def adj{{i}}_in_range
      adjacent{{i}}.select(&.in_range?)
    end
  {% end %}

  def to_s(io : IO) : Nil
    io << '(' << y << ", " << x << ')'
  end

  def inspect(io : IO) : Nil
    to_s(io)
  end

  def to_direction_char?(lrud = "LRUD") : Char?
    if y == 0 && x != 0
      x < 0 ? lrud[0] : lrud[1]
    elsif x == 0 && y != 0
      y < 0 ? lrud[2] : lrud[3]
    end
  end

  def self.to_direction?(c : Char, lrud = "LRUD")
    raise ArgumentError.new unless lrud.size == 4
    lrud.index(c).try { |i| {left, right, up, down}[i] }
  end

  def self.to_direction?(s : String, lrud = "LRUD")
    case s.size
    when 1
      to_direction?(s[0], lrud)
    when 2
      p1 = to_direction?(s[0], lrud) || return nil
      p2 = to_direction?(s[1], lrud) || return nil
      return nil unless p1.x ^ p2.x != 0 && p1.y ^ p2.y != 0
      p1 + p2
    end
  end
end

module Indexable(T)
  private def check_index_out_of_bounds(point : Point)
    check_index_out_of_bounds(point) { raise IndexError.new }
  end

  private def check_index_out_of_bounds(point : Point)
    if 0 <= point.y < size && 0 <= point.x < unsafe_fetch(point.y).size
      point
    else
      yield
    end
  end

  def fetch(point : Point)
    point = check_index_out_of_bounds(point) do
      return yield point
    end
    unsafe_fetch(point.y)[point.x]
  end

  def [](point : Point)
    fetch(point) { raise IndexError.new }
  end

  def []?(point : Point)
    fetch(point, nil)
  end
end

class Array(T)
  def []=(point : Point, value)
    index = check_index_out_of_bounds point
    @buffer[index.y][index.x] = value
  end
end

def generate_odd(n)
  a = Array.new({n, n}, nil.as(Int32?))
  p = Point[0, n // 2]
  k = 0
  loop do
    a[p %= n] = (k += 1)
    if a[p.ur % n].nil?
      p.ur!
    elsif a[p.down % n].nil?
      p.down!
    else
      break
    end
  end
  a.map &.map &.not_nil!
end

def generate_4x(n)
  a = Array.new({n, n}, nil.as(Int32?))
  Point.each do |p|
    p2 = p % 4
    if p2.x == p2.y || (p2.x + p2.y) == 3
      a[p] = p.to_i + 1
    end
  end
  Point.reverse_each do |p|
    if a[p].nil?
      a[p] = n * n - p.to_i
    end
  end
  a.map &.map &.not_nil!
end

LUX = [
  [[4, 1], [2, 3]],
  [[1, 4], [2, 3]],
  [[1, 4], [3, 2]],
]

def generate_4x2(n)
  k = n // 4
  m = k * 2 + 1
  b = generate_odd(m).map &.map { |x| x.pred * 4 }
  a = Array.new({n, n}, 0)
  Point.each(m, m) do |p|
    index = if (p.y <= k && p != Point[k, k]) || p == Point[k + 1, k]
              0
            elsif p.y <= k + 1
              1
            else
              2
            end
    {Point.zero, Point.right, Point.down, Point.dr}.each do |d|
      a[p * 2 + d] = LUX[index][d] + b[p]
    end
  end
  a
end

n = input(i)
Point.set_range(n, n)
ans = if n.odd?
        generate_odd(n)
      elsif n % 4 == 0
        generate_4x(n)
      else
        generate_4x2(n)
      end
puts ans.join('\n', &.join(' '))
yukicoder

結果

テストケース

ソースコード
