Checklist MAIO 2025 Training and Selection Programme, Selection Test 2 · Task 2
Dropped Tarots
Recover every tarot-card image hidden in a noisy 3D coloured point cloud, upright and noise-free, and rebuild the scene.
The task
Several tarot cards have been 'dropped into a box of pixels': the data are a point cloud whose rows hold 3D coordinates (x, y, z) and RGB colours, together with noise points.
The contestant must retrieve each card as an individual 2D image, upright (label at the bottom, readable left to right, at most 20 degrees of rotation), ideally perfectly upright (zero rotation, same dimensions as the original) and noise-free (only original pixel values), and then reconstruct the original 3D scene from the recovered 2D images.
Abridged by SOTA from the official materials. The official statement has the exact rules, and it wins wherever this summary differs.
At a glance
- You get
dropped_tarots.npy(a NumPy array of points with columns x, y, z, r, g, b), downloaded from the organisers' bucket by the notebook; a 3D plotting helper.- You submit
- The notebook with each recovered card plotted as a separate image, a reconstructed point-cloud tensor with the same number of columns as the original, and a short explanation.
- Scoring
- Hand-graded: 1 pt for all cards recovered upright; 1 pt for all cards perfectly upright; 1 pt for all cards perfectly upright and noise-free; 2 pts for reconstructing the original scene (without noise) from the recovered 2D images, capped at 1 pt if the images are not perfectly upright and noise-free; 1 pt for a brief explanation. Partial credit at the graders' discretion.
- Format
- Selection Test 2 of the Malaysian IOAI Training and Selection Programme 2025: five problems in two sittings (8 and 14 June 2025), about 2 hours per problem, used to pick the IOAI 2025 team. The problem was designed to be solved within 2 hours; all LLM assistance, including reasoning models, was allowed. Held in the second sitting (Day 2) according to the commit history of a participant's repository; graded completely by hand; slightly modified for distribution.