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https://github.com/chinesedfan/adventofcode
Solutions for Advent of Code, including 2015-2022
https://github.com/chinesedfan/adventofcode
advent-of-code advent-of-code-2015 advent-of-code-2016 advent-of-code-2017 advent-of-code-2018 advent-of-code-2019 advent-of-code-2020 advent-of-code-2021 advent-of-code-2022 adventofcode
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Solutions for Advent of Code, including 2015-2022
- Host: GitHub
- URL: https://github.com/chinesedfan/adventofcode
- Owner: chinesedfan
- Created: 2015-12-10T10:58:29.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2023-12-14T09:45:14.000Z (11 months ago)
- Last Synced: 2024-04-14T01:50:06.257Z (7 months ago)
- Topics: advent-of-code, advent-of-code-2015, advent-of-code-2016, advent-of-code-2017, advent-of-code-2018, advent-of-code-2019, advent-of-code-2020, advent-of-code-2021, advent-of-code-2022, adventofcode
- Language: JavaScript
- Homepage:
- Size: 439 KB
- Stars: 8
- Watchers: 3
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## Introduction
This project contains solutions for [Advent of Code](http://adventofcode.com/).
The difficulty of these puzzles is usually less than competitive programming problems, i.e. [CodeForces](https://codeforces.com). Even you can calculate the answer by a pencil and paper. Test cases are very simple and examples include nearly everything that you need to care about. But some of them is hard.
And the author provides a very interesting website!
ps.
- Remember to call `parseInt` when parsing the input by regular expressions.
- Do not try to find answers by binary search. The server will reject your submission after you have failed too much times.
- Solve puzzles by brute force searching if it is hard to find reasonable algorithms. Go to [Bogdanp/awesome-advent-of-code](https://github.com/Bogdanp/awesome-advent-of-code) or visit [reddit](https://www.reddit.com/r/adventofcode/) to get more hits.
## How to run
By default, `part` is `1`, and `YEAR` is the current year.
- `[YEAR=2015] node index.js [part] < input.txt`
- `[YEAR=2015] node index.js [part] -f input.txt`
## Summary
For hardness: S(Simple), M(Middle), H(Hard).
2015 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | iteration |
| 2 | S/S | iteration |
| 3 | S/S | simulation |
| 4 | S/S | md5 |
| 5 | S/S | filter strings |
| 6 | S/S | simulation |
| 7 | M/M | post-order tree traveling |
| 8 | S/S | string replacement |
| 9 | S/S | permutation |
| 10 | S/S | iteration |
| 11 | S/S | filter strings |
| 12 | S/S | recursion |
| 13 | S/S | permutation |
| 14 | S/S | simulation |
| 15 | S/S | permutation |
| 16 | S/S | filter |
| 17 | M/M | dynamic programming |
| 18 | S/S | simulation |
| 19 | S/H | iteration/special laws |
| 20 | M/M | find bound |
| 21 | M/M | permutation |
| 22 | H/H | dfs |
| 23 | S/S | cpu |
| 24 | M/M | dynamic programming |
| 25 | S/- | iteration |
2016 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | simulation |
| 2 | S/S | simulation |
| 3 | S/S | filter |
| 4 | S/S | filter |
| 5 | S/S | md5 |
| 6 | S/S | array operations |
| 7 | S/S | filter |
| 8 | S/S | simulation |
| 9 | S/S | string replacement/recursion |
| 10 | S/S | simulation |
| 11 | H/H | bfs, optimization |
| 12 | S/S | cpu |
| 13 | H/H | bfs |
| 14 | S/S | md5 |
| 15 | S/S | iteration |
| 16 | S/S | iteration |
| 17 | M/M | md5, bfs |
| 18 | S/S | iteration |
| 19 | H/H | find laws/dynamic programming |
| 20 | M/M | merge intervals |
| 21 | S/S | simulation |
| 22 | S/H | filter/bfs with special laws |
| 23 | S/M | cpu/optimization |
| 24 | M/M | bfs, permutation |
| 25 | S/- | cpu, find first |
2017 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | iteration |
| 2 | S/S | iteration |
| 3 | S/M | find laws/infinite grid |
| 4 | S/S | filter strings |
| 5 | S/S | iteration |
| 6 | S/S | simulation |
| 7 | S/S | tree simulation/recursion |
| 8 | S/S | simple cpu simulation |
| 9 | S/S | iteration |
| 10 | S/S | simulation |
| 11 | S/S | find laws/simulation |
| 12 | S/S | bfs |
| 13 | S/S | simulation/find first |
| 14 | S/M | iteration/bfs |
| 15 | S/S | iteration |
| 16 | S/M | simulation/find laws |
| 17 | S/S | iteration |
| 18 | S/M | cpu |
| 19 | S/S | simulation |
| 20 | S/M | find stable/filter collisions |
| 21 | M/M | iterate grid |
| 22 | S/S | infinite grid |
| 23 | S/H | cpu/assembly to filter primes |
| 24 | S/S | dfs |
| 25 | S/- | turing machine |
2018 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | iteration |
| 2 | S/S | filter strings/sort then diff |
| 3 | S/S | rectangles overlap |
| 4 | M/M | simulation |
| 5 | S/S | merge with stack |
| 6 | M/S | simulation |
| 7 | S/M | typology sorting/simulation |
| 8 | S/S | string parsing/recursion |
| 9 | S/M | simulation |
| 10 | M/S | auto scale |
| 11 | S/M | find the max sum rectangle |
| 12 | S/S | simulation/find loop |
| 13 | S/S | simulation |
| 14 | S/S | iteration/string match |
| 15 | M/S | simulation/find bound |
| 16 | S/S | cpu |
| 17 | M/S | water simulation |
| 18 | S/S | simulation/find loop |
| 19 | S/S | cpu/find logic |
| 20 | S/S | parse regexp and bfs |
| 21 | S/S | cpu to find logic |
| 22 | S/M | dp/bfs |
| 23 | S/H | filter/max clique |
| 24 | S/S | simulation/find bound |
| 25 | S/- | bfs |
2019 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | iteration |
| 2 | S/S | cpu |
| 3 | M/S | line cross |
| 4 | S/S | filter numbers |
| 5 | S/S | cpu |
| 6 | S/S | bfs/nearest common ancestor |
| 7 | S/M | cpu/generators |
| 8 | S/S | count numbers/print and see |
| 9 | M/S | big numbers cpu |
| 10 | M/M | check connectivity/sort by k |
| 11 | S/S | cpu count visited/print and see |
| 12 | S/M | n-object simulation/lcm |
| 13 | S/H | cpu output map/game simulation |
| 14 | S/S | typology sorting/binary search |
| 15 | S/S | bfs |
| 16 | S/M | fft simulation |
| 17 | S/M | find intersections/cut routes |
| 18 | M/H | shortest path |
| 19 | S/S | count/find |
| 20 | M/M | shortest path |
| 21 | M/H | boolean cpu programming |
| 22 | S/H | shuffle simulation/number theory|
| 23 | M/M | multiple cpus |
| 24 | S/S | life game simulation |
| 25 | M/- | cpu rpg |
Different scripts for day 25,
- day25.js, normal program but has `-i` option to load commands
- day25-map.js, searching for all rooms
- day25-input.txt, according to the rooms map, collect items and go to the checkpoint room
- day25-drop.js, try each possible combinations of items to pass the weight check
2020 (Done!)
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | 2 sum/3 sum |
| 2 | S/S | filter strings |
| 3 | S/S | count |
| 4 | S/S | filter strings |
| 5 | S/S | iteration/print and see |
| 6 | S/S | count |
| 7 | S/S | bfs |
| 8 | S/S | cpu |
| 9 | S/S | filter/two points |
| 10 | S/S | sort and count/dp |
| 11 | S/S | life games simulation |
| 12 | S/S | moving iteration |
| 13 | S/M | find min/number theory |
| 14 | S/S | bits iteration |
| 15 | S/S | iteration |
| 16 | S/S | filter/match |
| 17 | S/S | 3d/4d life games simulation |
| 18 | S/S | arithmetic ast |
| 19 | S/M | regexp tree/special convertion |
| 20 | S/H | picture matching/pattern search |
| 21 | M/S | analyze insets |
| 22 | S/S | cards array iteration |
| 23 | S/S | array iteration |
| 24 | S/S | hex flip/life game simulation |
| 25 | S/- | number iteration |
2021
### 2021
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | iteration |
| 2 | S/S | iteration |
| 3 | S/S | count and filter strings |
| 4 | S/S | simulate game |
| 5 | S/S | count grid points |
| 6 | S/M | simulate list/calculate |
| 7 | S/S | midpoint/find best position |
| 8 | S/M | filter length/analyse mapping |
| 9 | S/S | filter points/bfs |
| 10 | S/S | brackets matching |
| 11 | S/S | simulate grid |
| 12 | S/S | bfs to find ways |
| 13 | S/S | fold dots/print and see |
| 14 | S/M | iteration |
| 15 | S/S | shortest path |
| 16 | S/S | parse packages |
| 17 | S/S | simulate shoot |
| 18 | M/S | brackets iteration |
| 19 | M/S | coordinates match |
| 20 | S/S | iteration |
| 21 | S/S | simulate game |
| 22 | S/H | cube overlap/discretization |
| 23 | M/- | move boxes |
| 24 | H/S | cpu analyse |
| 25 | S/- | simulate |
### 2022
| day | hardness | keywords |
| --- |:--------:| -------------------------------:|
| 1 | S/S | find max |
| 2 | S/S | RSP game |
| 3 | S/S | find same character |
| 4 | S/S | segment overlap |
| 5 | S/S | stack simulation |
| 6 | S/S | scan string |
| 7 | S/S | file directory size, DFS |
| 8 | S/S | matrix scan |
| 9 | S/- | rope positions |
| 10 | S/S | simple cpu/draw letters |
| 11 | S/M | simulation/keep reminders |
| 12 | S/S | bfs |
| 13 | S/S | compare lists |
| 14 | M/M | sand simulation |
| 15 | S/M | count positions/merge segments |
| 16 | -/- | bfs |
| 17 | -/- | tetris |
| 18 | S/- | count cube surfaces |
| 19 | -/- | build robots |
| 20 | M/S | list iteration |
| 21 | S/M | dfs/binary search |
| 22 | S/- | simulate moving |
| 23 | S/S | grid iteration |
| 24 | -/- | bfs |
| 25 | S/- | base conversion |
## Bonus
Released at [reddit](https://www.reddit.com/r/adventofcode/comments/72aizu/bonus_challenge/). You can download `input.txt` directly from [here](https://gist.githubusercontent.com/topaz/15518587415ccd0468767aed4192bfd3/raw/c5bfd6a7d40eabe1ae8b9a0fb36a939cb0c5ddf4/bonuschallenge.txt).
- `YEAR=2016 node index.js 26 < input.txt > bonus.out.1`
- `YEAR=2016 node index.js 8 2 < bonus.out.1`
## Thanks to
- [petertseng](https://github.com/petertseng), first met in [reddit](https://www.reddit.com/r/adventofcode/comments/5hoia9/2016_day_11_solutions/db1v1ws/) for 2016/day11, who also has full solutions in Ruby/Haskell/Rust/D.
- [sguest](https://github.com/sguest/advent-of-code), for solving 2018/day22, with JavaScript solutions of each year.
- [albertobastos](https://github.com/albertobastos/advent-of-code-2018-nodejs), for solving 2018/day15, with partial solutions of 2018 in JavaScript.
- [kufii](https://github.com/kufii/Advent-Of-Code-2019-Solutions), provides a cool [website](https://kufii.github.io/Advent-Of-Code-2019-Solutions/) to show 2019 JavaScript solutions.
- [mcpower](https://github.com/mcpower/adventofcode), also met in [reddit](https://www.reddit.com/r/adventofcode/comments/ee0rqi/2019_day_22_solutions/fbnkaju/) for 2019/day22, and has solutions for 2016(partial)/17/18/19 in Python/Rust.
- [romellem](https://github.com/romellem/advent-of-code) for solving 2021/day24, with most of years in JavaScript.