diff options
Diffstat (limited to 'day04/part1.rb')
| -rw-r--r-- | day04/part1.rb | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/day04/part1.rb b/day04/part1.rb new file mode 100644 index 0000000..529572c --- /dev/null +++ b/day04/part1.rb @@ -0,0 +1,9 @@ +pairs = $stdin.readlines.map { |line| + line.strip.split(?,).map { |range| + Range.new(*range.split(?-).map(&:to_i)) + } +} + +puts pairs.select { |a, b| + a.cover?(b) || b.cover?(a) +}.count |