class DiceMatrix
    def initialize(num_dice, die_size, adjustment = 1)
        @matrix = Array.new()
        permutations = die_size ** num_dice
    
        permutations.times do |x|
            @matrix[x] = Array.new()
            num_dice.times do |y|
                @matrix[x][y] = ((x / (die_size ** y)).floor % die_size) + adjustment
            end
        end   
    end

    def reduce(from_bottom = 0, from_top = 0)
        @matrix.each_index do |x|
            @matrix[x].sort!
            @matrix[x] = @matrix[x].slice(from_bottom, @matrix[x].length - (from_bottom + from_top))
        end
    end
    
    def length
        @matrix.length
    end
    
    def each
        @matrix.each
    end
    
    def to_array
        @matrix
    end
end