aoc/2018/6/main.rb

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2023-04-17 18:18:20 +00:00
require 'pry'
coords = []
# Parse input file.
File.open("input", "r") do |f|
f.each_line do |line|
x, y = line.split(", ").map(&:chomp).map(&:to_i)
coords.push({
x: x,
y: y,
})
end
end
# Create matrix with correct size
left_bound = right_bound = coords.first[:x]
top_bound = bottom_bound = coords.first[:y]
coords.each do |coord|
if coord[:x] < left_bound
left_bound = coord[:x]
end
if coord[:x] > right_bound
right_bound = coord[:x]
end
if coord[:y] < top_bound
top_bound = coord[:y]
end
if coord[:y] > bottom_bound
bottom_bound = coord[:y]
end
end
height = bottom_bound - top_bound + 1
width = right_bound - left_bound + 1
coords.map!{|coord| {x: coord[:x] - left_bound, y: coord[:y] - top_bound}}
matrix = Array.new(height){Array.new(width){0}}
# Fill the matrix with lowest distance to coordinates
(0...height).each do |y|
(0...width).each do |x|
coords.each_with_index do |coord, i|
distance = (x - coord[:x]).abs + (y - coord[:y]).abs
matrix[y][x] += distance
end
end
end
=begin
# Count the area for each coordinate.
(0...height).each do |y|
(0...width).each do |x|
if (y == 0 || x == 0 || y == height - 1 || x == width - 1) && matrix[y][x][:coords].length == 1
coords[matrix[y][x][:coords].first][:infinite] = true
else
if matrix[y][x][:coords].length == 1
coords[matrix[y][x][:coords].first][:area] += 1
end
end
end
end
=end
puts matrix.flatten.select{|point| point < 10000}.length