🎄	🎅
23	Longest path	BFS
22	Simulation	BFS
		- length-1 beams falling on 3-D plain
21	Toposort	BFS
		- a furthermore harder part 2 geez
20	Toposort	BFS
		- an even harder part 2 . done
19	Toposort	Hard one - interval for the 2nd part BFS
		- difficult part 2
18	Polygon Geometry	Hard problem - shoelace algorithm pick theorem
17	Dijkstra	priority queue heapq dijkstra
		- cf. 2021/day/15
16	BFS	Bruteforce traversal under rules
15	Hashmap	ordered map implementation memorization
		- Biggest pb is in reading comprehension
14	Transpose a 2D List	2d transposition
13	Wildcard + Transpose	2d transposition wildcard
		- The Wildcard has only 1 possible outcome
12	1D Nonogram	wildcard permutation recursive / DFS
		- Guess wildcards to get max outcome
		- Permute inside a custom comparator
		- DFS
11	Coordinates Pairing1	Hard part 2 - coordinates visualizing
		- Keep only relevent coordinates
		- n(n-1)/2 Pairing
10	Polygon + Graph	Hard problem - BFS
		- BFS + inside-a-polygon principle
9	Bruteforce Sim	Medium
		- Append rows until row is all 0
8	Iterate indefinitely	Medium, a grid of states problem
		- Lcm + iterate until it stops
7	Wildcards + Poker	Hard day
		- Sorting hands w/ custiom comparator
6	Quadratic equation	Easy
		- linear adding
5	Intervals	Hard - visualizing overlapping intervals
		- ① | ② | ③
		- max(curr & next L) for L bound
		- min(curr & next R) for R bound
4	Math	- Math is at the heart of part 2
		- Each child win gains pts of parent that wins
3	Parse djacent integers	- Took me a while but a satisfying day
		- Save a number by its begin, end coordinates
		- edgecase 1 end-of-row numbers
		- edgecase 2 identical nums in 3x3
2	Parse sring segment	- Reading comprehension
1	Parse number words	- Reading comprehension

Footnotes

1. [thread]: Also skoh, with the other problems you could create a map of the problem and then use that map to solve the problem. Here it's so big that you have to compare distances, instead of checking if the map at certain coordinates contains a certain character. This is what makes it harder - Adringar 15/12/22 ↩