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🇧🇷 Brazil ONIA 2025, Phase 4, stage 1 (20 May 2025)
Fourth-phase stage 1 test
Twenty questions (3 h, no computer) on algorithms, data structures, Python tracing and common ML failure modes such as overfitting.
- Statement
- Portuguese · Read it in English (Google Translate)
- To hand in
- Written answers
- Data type
- ✍️ Written questions
- Estimated difficulty
- Unknown
- Solution
- See a solution ↗ · best opened after you have tried
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The foundations of the learning path for this kind of data.
›How to tackle it
- Read everything first. Note what each question asks and how it is marked.
- Work on paper. Justify every step: at an olympiad, the reasoning earns the points.
- Then compare. Open the solution only once you have an answer, and compare your reasoning with it.
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