Advent of Code 2021

My solutions written in C++ 20

Performance

Day	Runtime Part 1	Runtime Part 2	Coded Myself	Looked up Solution
1	300ns	300ns	✅	❌
2	2μs	2.5μs	✅	❌
3	9μs	21μs	✅	❌
4	1.5ms	1.5ms	✅	❌
5	3ms	3ms	✅	❌
6	700ns	1.5ms	✅	❌
7	3μs	900ns	✅	❌
8	20μs	950μs	✅	❌
9	72.5μs	150μs	✅	❌
10	63μs	150μs	✅	❌
11	185μs	187μs	✅	❌
12	16.5ms	500ms	✅	❌
13	197μs	550.5μs	✅	❌
14	176.5μs	727.5μs	✅	✅
15	651.5μs	21ms	✅	❌
16	160μs	160μs	✅	❌
17	100ns	2ms	✅	❌
18	7ms	124.5ms	✅	❌
19	835.5ms	831.5ms	✅	✅
20	2.5ms	201.5ms	✅	❌
21	700ns	443ms	✅	✅
22	7ms	7ms	❌	✅
23	N/A	N/A	❌	✅
24	3μs	3μs	❌	✅
25	426ms	N/A	✅	❌