project-euler-ruby-solutions/euler.rb at master · javs-perez/project-euler-ruby-solutions · GitHub

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def line_x_4
  array = [ %w(08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08),
            %w(49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00),
            %w(81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65),
            %w(52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91),
            %w(22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80),
            %w(24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50),
            %w(32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70),
            %w(67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21),
            %w(24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72),
            %w(21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95),
            %w(78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92),
            %w(16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57),
            %w(86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58),
            %w(19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40),
            %w(04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66),
            %w(88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69),
            %w(04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36),
            %w(20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16),
            %w(20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54),
            %w(01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48)]


  max_multiplication = []
  info_array = []

  array.each_with_index do |line, line_index|
    line.each_with_index do |number, num_index|
      multiplication_right    = number.to_i * (line[num_index + 1]).to_i * (line[num_index + 2]).to_i * (line[num_index + 3]).to_i
      multiplication_left = number.to_i * (line[num_index - 1]).to_i * (line[num_index - 2]).to_i * (line[num_index - 3]).to_i

      if line_index < 17
        multiplication_down    = number.to_i * (array[line_index + 1][num_index]).to_i     * (array[line_index + 2][num_index]).to_i     * (array[line_index + 3][num_index]).to_i
      end

      if num_index < 17 && line_index < 17
        multiplication_diagonal_right = number.to_i * (array[line_index + 1][num_index + 1]).to_i * (array[line_index + 2][num_index + 2]).to_i * (array[line_index + 3][num_index + 3]).to_i
      end

      if line_index < 20 && line_index > 2
        multiplication_up    = number.to_i * (array[line_index - 1][num_index]).to_i     * (array[line_index - 2][num_index]).to_i     * (array[line_index - 3][num_index]).to_i
      end

      if (line_index < 20 && line_index > 2) && (num_index < 17)
        multiplication_diagonal_left = number.to_i * (array[line_index - 1][num_index + 1]).to_i * (array[line_index - 2][num_index + 2]).to_i * (array[line_index - 3][num_index + 3]).to_i
      end

      max_multiplication.push(multiplication_right) if multiplication_right != nil
      max_multiplication.push(multiplication_down) if multiplication_down != nil
      max_multiplication.push(multiplication_diagonal_right) if multiplication_diagonal_right != nil
      max_multiplication.push(multiplication_diagonal_left) if multiplication_diagonal_left != nil
      max_multiplication.push(multiplication_left) if multiplication_left != nil
      max_multiplication.push(multiplication_up) if multiplication_up != nil
    end
  end
  p max_multiplication.max
end

line_x_4