The International Mathematical Olympiad is an annual problem-solving event, based around six hard, elementary problems. Each year, hundreds of contestants independently attempt all six problems, and are awarded up to seven points for each problem.

The official site, while great for seeing how individuals and nations performed, is not so well-suited to aggregating results on a per-problem basis. I created the app below (source here) to fill this gap.

For example it seems reasonable to conclude that problem 4 from 2010 is fairly easy and that it requires a couple of distinct tricks to solve it.