See sub dirs; implementation set up probably changes over the years.
language: D
- day 1
- day 2
- day 3
- day 4
- day 5
- day 6
- day 7
- day 8
- day 9
- day 10 (part 1 done)
- day 11
- day 12
language: D
- day 1
- day 2
- day 3
- day 4
- day 5
- day 6
- day 7
- day 8
- day 9
- day 10
- day 11
- day 12
- day 13
- day 14
- day 15
- day 16
- day 17
- day 18
- day 19 (part 1 done)
- day 20
- day 21
- day 22
- day 23
- day 24
- day 25