About Studolymp

What is Studolymp?

Studolymp is an independent project that collects university-level olympiad archives and turns the published results into difficulty and discrimination statistics, so students can train against real problems and see what was actually hard. The IMC is the first olympiad in the archive; the project is built to host several.

How to use Studolymp

• Catalog — search statements and filter by topic, year, day and difficulty; sort by “hardest first” to find the killers.
• Problem page — statement, official solution(s), and “how the field did”.
• Year dashboards — per-edition difficulty (Day 1 / Day 2), the difficulty-vs-discrimination scatter, the per-problem table, and standings where published.
• Worksheet builder — collect problems (whole days at a time) into a printable training set and share it as a link.

How we compute the statistics

The methods below are the same across olympiads; only the difficulty bands are per-olympiad. For the IMC specifics — the exact cohort cutoff, the solved/near-0 thresholds and the band percentages — see the IMC methodology.

• Field cohort — per-problem statistics are computed over a cohort that excludes near-zero participants (people who effectively did not engage), so difficulty reflects genuine contenders, not no-shows.
• “% solved” / “near-0” — shares of the field cohort scoring near the top / near the bottom of a problem’s maximum. (We label the low end near-0, not “zero”, because it is a small band, not an exact zero.)
• Difficulty bands — each problem gets a band from easy to killer, derived live from the field-cohort performance. Bands are relative to each olympiad’s own distribution and are not comparable across olympiads.
• Discrimination — how well a problem separated strong from weak contestants: the corrected item–total correlation (the problem’s score vs the contestant’s total minus that problem). High = the problem tracked overall strength; near-zero = everyone treated it alike (often because nearly all failed it). We do not use a top-vs-bottom mean gap, which confuses difficulty with discrimination.

Disclaimer & attribution

Studolymp is an independent, unofficial project. Each olympiad’s problems, official solutions and results belong to that olympiad and the respective authors, and are reproduced with permission; statistics are computed by Studolymp and are unofficial. See each olympiad’s About page for its full attribution and the link to the official source — for the IMC, IMC methodology & attribution.