75 lines
1.5 KiB
Ruby
75 lines
1.5 KiB
Ruby
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require 'pry'
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coords = []
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# Parse input file.
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File.open("input", "r") do |f|
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f.each_line do |line|
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x, y = line.split(", ").map(&:chomp).map(&:to_i)
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coords.push({
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x: x,
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y: y,
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})
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end
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end
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# Create matrix with correct size
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left_bound = right_bound = coords.first[:x]
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top_bound = bottom_bound = coords.first[:y]
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coords.each do |coord|
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if coord[:x] < left_bound
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left_bound = coord[:x]
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end
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if coord[:x] > right_bound
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right_bound = coord[:x]
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end
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if coord[:y] < top_bound
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top_bound = coord[:y]
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end
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if coord[:y] > bottom_bound
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bottom_bound = coord[:y]
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end
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end
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height = bottom_bound - top_bound + 1
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width = right_bound - left_bound + 1
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coords.map!{|coord| {x: coord[:x] - left_bound, y: coord[:y] - top_bound}}
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matrix = Array.new(height){Array.new(width){0}}
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# Fill the matrix with lowest distance to coordinates
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(0...height).each do |y|
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(0...width).each do |x|
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coords.each_with_index do |coord, i|
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distance = (x - coord[:x]).abs + (y - coord[:y]).abs
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matrix[y][x] += distance
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end
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end
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end
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=begin
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# Count the area for each coordinate.
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(0...height).each do |y|
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(0...width).each do |x|
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if (y == 0 || x == 0 || y == height - 1 || x == width - 1) && matrix[y][x][:coords].length == 1
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coords[matrix[y][x][:coords].first][:infinite] = true
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else
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if matrix[y][x][:coords].length == 1
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coords[matrix[y][x][:coords].first][:area] += 1
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end
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end
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end
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end
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=end
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puts matrix.flatten.select{|point| point < 10000}.length
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