5 Commits

Author	SHA1	Message	Date
Stefan Harmuth	4c9e7f2838	day20: comment to clarify the == 4	2020-12-20 20:23:26 +01:00
Stefan Harmuth	961fc2a8cb	day20: don't re-build possible border lists every loop	2020-12-20 20:19:32 +01:00
Stefan Harmuth	db841e474f	day20: in p2 restrict p1 to only what we need	2020-12-20 10:25:23 +01:00
Stefan Harmuth	0098cac688	day20: at least remove your debug output	2020-12-20 10:21:43 +01:00
Stefan Harmuth	10ffd11c46	day20: raw (ugly) version	2020-12-20 10:18:12 +01:00