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Advent of Code
An annual calendar of programming puzzles, with past years still open to solve
Toolora score96Free
Free; optional donations a…
| Spec | Stack Overflow | Advent of Code | Busuu |
|---|---|---|---|
| Category | Education & Learning | Education & Learning | Education & Learning |
| Pricing | Free | Free; optional donations and merch | Free lessons + Premium subscription |
| Toolora score | 90/100 | 96/100 | 85/100 |
| Best for | qanda, programming, errors, community | puzzles, programming, calendar, practice | languages, cefr, community, courses |
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