2020

Advent of Code 2020

Day	Fun	Difficulty	Task Description
1	★★★☆☆	★☆☆☆☆	nested loops
2	★★★★☆	★☆☆☆☆	string rule matching
3	★★★★☆	★★☆☆☆	2D map traversal
4	★★☆☆☆	★☆☆☆☆	data validation
5	★★★☆☆	★☆☆☆☆	binary number parsing and set arithmetic
6	★★★★☆	★★☆☆☆	set unions and intersections
7	★★★☆☆	★★★☆☆	reduction operations on hierarchical topologies
8	★★★★☆	★★★☆☆	virtual machine interpreter
9	★★★☆☆	★★★☆☆	number sequence partial sum combinatorics
10	★★★☆☆	★★★★☆	pseudo-Fibonacci sequence
11	★★★★☆	★★★☆☆	2D cellular automaton simulation
12	★★★★☆	★★☆☆☆	follow 2D motion instructions
13	★★★☆☆	★★★★☆	modular arithmetic search
14	★★★★☆	★★★☆☆	bitmasks and combinatorics
15	★★★☆☆	★★★☆☆	rule-based number game simulation
16	★★★★★	★★★★☆	constraint-based field order guessing
17	★★★★☆	★★★★☆	3D and 4D cellular automaton
18	★★☆☆☆	★★★★☆	operator precedence parsing
19	★★★☆☆	★★★★★	recursive regular expression matching
20	★★★★★	★★★★☆	jigsaw puzzle solving and 2D pattern matching
21	★★★☆☆	★★★★☆	logic puzzle solver
22	★★★☆☆	★★★☆☆	game simulation
23	★★☆☆☆	★★★★☆	cyclic list operations
24	★★★★☆	★★★☆☆	cellular automaton on hexagonal grid
25	★★★☆☆	★★☆☆☆	break (weak) Diffie-Hellman key exchange