mirror of
https://github.com/wezm/advent-of-code.git
synced 2024-11-14 11:38:01 +00:00
39 lines
813 B
Ruby
39 lines
813 B
Ruby
|
NUM = /\d+/
|
||
|
|
SYM = /[^.]/
|
||
|
|
|
||
|
|
def part1(input)
|
||
|
|
part_numbers = []
|
||
|
|
|
||
|
|
input.each_with_index do |line, i|
|
||
|
|
offset = 0
|
||
|
|
while m = NUM.match(line, offset)
|
||
|
|
start = m.begin(0)
|
||
|
|
finish = m.end(0)
|
||
|
|
offset = finish
|
||
|
|
span = [0, start - 1].max..finish
|
||
|
|
|
||
|
|
#p i.to_s, m[0]
|
||
|
|
above = input[i - 1][span] if i > 0
|
||
|
|
below = input[i + 1][span] if i < input.length - 1
|
||
|
|
left = line[start - 1] if start > 0
|
||
|
|
right = line[finish]
|
||
|
|
#p [line[span], above, below, left, right]
|
||
|
|
#p [i, m[0], start, finish, line[span]]
|
||
|
|
|
||
|
|
if [above, below, left, right].compact.any? { |x| x.match?(SYM) }
|
||
|
|
part_numbers << m[0].to_i
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
part_numbers.sum
|
||
|
|
end
|
||
|
|
|
||
|
|
def part2(input)
|
||
|
|
# todo
|
||
|
|
end
|
||
|
|
|
||
|
|
input = ARGF.readlines.map(&:rstrip)
|
||
|
|
puts part1(input)
|
||
|
|
puts part2(input)
|