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README.md

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+---
+license: cc-by-4.0
+pretty_name: "IOAI 2026 – IOAI Field"
+tags:
+- ioai
+- olympiad
+- regression
+viewer: false
+---
+
+# IOAI 2026 — IOAI Field
+
+Official contest data for **IOAI Field**, task 6 (Day 2) of the [IOAI 2026](https://ioai-official.org) Individual Contest, held in Astana, Kazakhstan.
+
+The IOAI logo is modelled as a spatial function F(x, y, W) over the unit plane. Contestants train a small network **from scratch** (no pretrained weights, ≤ 20,260 parameters) to reproduce the field; the grader overlays hidden leaderboard configurations onto the training config and retrains the submitted notebook.
+
+The task statement, translations, baseline and grader live in the [IOAI-2026 GitHub repository](https://github.com/IOAI-official/IOAI-2026/tree/main/Individual-Contest/6_IOAI_Field). This repository holds **data only** and is **not published**.
+
+## Subsets
+
+| Subset | Path | Contestants saw it | Role |
+|---|---|---|---|
+| Public – train | `public/train_config/`, `public/train.npz`, `public/test.npz`, `public/meta.json`, `public/preview.png` | yes | the visible field configuration and samples |
+| Private – held-out test | `private/test_private.npz` | no | hidden evaluation queries |
+| Private – Leaderboard A | `private/leaderboard_a_config/` | no | hidden field config for the **live leaderboard** |
+| Private – Leaderboard B | `private/leaderboard_b_config/` | no | hidden field config for the **final ranking** |
+
+> ⚠️ **The `private/` subset contains the hidden evaluation configurations — effectively the answers.** This dataset is kept private so the task remains reusable.
+
+## Credits
+
+Proposed by **Evgenii Tsymbalov**; developed by **Evgenii Tsymbalov**, **Ekaterina Fadeeva**, **Daniil Kazantsev**, **Maiya Goloburda** and **Magauiya Zhussip**. Published by the IOAI 2026 Scientific Committee under CC BY 4.0.