IMC 2026 is under way in Blagoevgrad, Bulgaria (27 July – 3 August 2026).
The competition is running right now. Problems, individual results and the difficulty statistics appear on this page as the organisers publish them — there is nothing to show for a part of the competition that has not happened yet.
Day 1 was contested on 29 July 2026.
Per-problem difficulty
Day 1
Difficulty vs discrimination
Each dot is one problem. X — how many solved it (scored ≥ 8 of 10); Y — discrimination, i.e. how well the problem told strong contestants from weak ones (score-vs-total correlation).
A good problem sits high and away from the edges. Bottom-left dots separated nobody — almost everyone failed them the same way.
Problem statistics
Same data as the Day 1 / Day 2 charts above. Add diploma cohorts to compare winners against the field.
| # | difficulty | all | disc | topics | ||||
|---|---|---|---|---|---|---|---|---|
| avg | solved | near-0 | ||||||
| Day 1 | ||||||||
| P1 | easy | 8.3 | 73% | 6% | 0.11 | real analysisinequalities | ||
| P2 | medium | 5.5 | 50% | 35% | 0.32 | linear algebra | ||
| P3 | hard | 2.9 | 18% | 56% | 0.17 | combinatorics | ||
| P4 | very hard | 1.4 | 7% | 74% | 0.24 | sequences & seriesreal analysis | ||
| P5 | killer | 0.1 | 1% | 99% | 0.09 | polynomialsinequalities | ||
A diploma-cohort cell needs at least 5 scores, else it shows “—”. How these statistics are computed →