2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024
| Day | Problem Page | Status | Difficulty | Solution Page | Test Page | Tags |
|---|---|---|---|---|---|---|
| 1 | Sonar Sweep | 🥇 | ❄️ | day_01.ex | day_01_test.exs | sliding-window, sequence, rust |
| 2 | Dive! | 🥇 | ❄️ | day_02.ex | day_02_test.exs | grid, rust |
| 3 | Binary Diagnostic | 🥇 | ❄️ ❄️ | day_03.ex | day_03_test.exs | calculation |
| 4 | Giant Squid | 🥇 | ❄️ ❄️ | day_04.ex | day_04_test.exs | grid, random-access, optimization |
| 5 | Hydrothermal Venture | 🥇 | ❄️ | day_05.ex | day_05_test.exs | set |
| 6 | Lanternfish | 🥇 | ❄️ ❄️ | day_06.ex | day_06_test.exs | map |
| 7 | The Treachery of Whales | 🥇 | ❄️ | day_07.ex | day_07_test.exs | calculation |
| 9 | Smoke Basin | 🥇 | ❄️ ❄️ ❄️ | day_09.ex | day_09_test.exs | graph, scc |
| 15 | Chiton | 🥇 | ❄️ ❄️ ❄️ ❄️ | day_15.ex | day_15_test.exs | graph, graph-route, slow |
| 16 | Packet Decoder | 🥇 | ❄️ ❄️ ❄️ | day_16.ex | day_16_test.exs | bitwise |
| 21 | Dirac Dice | 🥇 | ❄️ ❄️ ❄️ ❄️ ❄️ | day_21.ex | day_21_test.exs | slow, needs-improvement |
| 25 | Sea Cucumber | 🥇 | ❄️ ❄️ ❄️ | day_25.ex | day_25_test.exs | vector, quadratic, not-fast-enough, grid |