change directory names

18/6/input

@@ -0,0 +1,50 @@
+135, 127
+251, 77
+136, 244
+123, 169
+253, 257
+359, 309
+100, 247
+191, 323
+129, 323
+76, 284
+69, 56
+229, 266
+74, 216
+236, 130
+152, 126
+174, 319
+315, 105
+329, 146
+288, 51
+184, 344
+173, 69
+293, 80
+230, 270
+279, 84
+107, 163
+130, 176
+347, 114
+133, 331
+237, 300
+291, 283
+246, 297
+60, 359
+312, 278
+242, 76
+81, 356
+204, 291
+187, 335
+176, 98
+103, 274
+357, 144
+314, 118
+67, 196
+156, 265
+254, 357
+218, 271
+118, 94
+300, 189
+290, 356
+354, 91
+209, 334

18/6/main.rb

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+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

18/6/sample

@@ -0,0 +1,5 @@
+0, 0
+0, 10
+10, 0
+10, 10
+3, 4