input_spiral.txt

3;3;1 2 3 4 5 6 7 8 9
5;5; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

4;  5; a b c d e f g h i j k l m n o p q r s t
6;  4; a b c d e f g h i j k l m n o p q r s t u v w x
4;  5; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
6;  3; a b c d e f g h i j k l m n o p q r
7;  4; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
12; 3; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J
9;  4; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J
4;  3; a b c d e f g h i j k l
4; 12; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V
7;  6; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
3;  9; a b c d e f g h i j k l m n o p q r s t u v w x y z A
6;  3; a b c d e f g h i j k l m n o p q r
3;  8; a b c d e f g h i j k l m n o p q r s t u v w x
3;  4; a b c d e f g h i j k l
3;  3; a b c d e f g h i
5;  3; a b c d e f g h i j k l m n o
11; 3; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G
4; 10; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N
13; 3; a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M
3;  8; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

spiral.rb

def spiral_matrix(row, col, numbers)
  return 0 if numbers.size > row * col
  total_rows = row.times.map { numbers.slice!(0..col-1) }
  matrix_print = []

  0.upto(row-1) do |index|
    0.upto(col-1)     { |val| matrix_print << total_rows[index][val]         unless matrix_print.include?(total_rows[index][val]) }
    0.upto(row-1)     { |val| matrix_print << total_rows[val][(col-1)-index] unless matrix_print.include?(total_rows[val][(col-1)-index]) }
    (col-1).downto(0) { |val| matrix_print << total_rows[(row-1)-index][val] unless matrix_print.include?(total_rows[(row-1)-index][val]) }
    (row-1).downto(0) { |val| matrix_print << total_rows[val][index]         unless matrix_print.include?(total_rows[val][index]) }
  end
  matrix_print.each { |num| print "#{num} " }
  puts
end

inputfile = File.new(ARGV[0]).readlines.map { |val| val.chomp.split(";") }

inputfile.each do |input|
  next if input.empty?
  row     = input[0].to_i
  columns = input[1].to_i
  numbers = input[2].split

  spiral_matrix(row, columns, numbers)
end