blob: dc748905c1f066816486acaef5987067132fdd7e (
plain)
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
|
#!/usr/bin/env ruby
def manhattan_distance(x, y, p)
return (x - p.first).abs + (y - p.last).abs
end
input = $stdin.readlines.map(&:chomp).map{|i|i.split(", ").map(&:to_i)}
MAX_DISTANCE = 10000
xoff = input.map(&:first).min - 1
yoff = input.map(&:last).min - 1
input.each do |p|
p[0] -= xoff
p[1] -= yoff
end
wid = input.map(&:first).max + 1
hei = input.map(&:last).max + 1
grid = Array.new(wid) { Array.new(hei, false) }
(0...wid).each do |x|
(0...hei).each do |y|
dist_sum = input.map{|p|manhattan_distance(x, y, p)}.sum
grid[x][y] = true if dist_sum < MAX_DISTANCE
end
end
puts grid.flatten.count(true)
|
