diff options
author | Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com> | 2020-12-25 15:26:01 +0100 |
---|---|---|
committer | Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com> | 2020-12-25 15:26:01 +0100 |
commit | 5a28775f19a8a48b67fc41e048c2a3958afa1e42 (patch) | |
tree | 8cababf438ee509ccb51a2023430891876cc2d88 /10/a.rb | |
parent | 15c6d8d79d9ec00a7abb14f90bd65547893c76f2 (diff) |
Add day 10
Diffstat (limited to '10/a.rb')
-rw-r--r-- | 10/a.rb | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -0,0 +1,10 @@ +lines = File.readlines('input.txt').map { |l| l.to_i } +lines.sort! +lines.unshift(0) +lines.push(lines.last + 3) +diffs = Hash.new 0 +lines.each_cons 2 do |chargers| + diffs[chargers[1] - chargers[0]] += 1 +end + +puts diffs[1] * diffs[3] |