Adam Millerchip 1e74b21dc5 Day 4 part 1		2023-12-04 18:00:25 +09:00
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day1.exs	optimise: no numbers start with r or x	2023-12-02 00:16:19 +09:00
day2.exs	2023 Day 2	2023-12-02 15:00:28 +09:00
day4.exs	Day 4 part 1	2023-12-04 18:00:25 +09:00