Checklist for OI Problems

A complete answer to the question, "How to excel at IOI-style contests?".

Hope this can help anyone preparing for future OIs.

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Keep track of OI problems

This checklist contains 1169 hard and interesting problems, with appropriate judge links given. You can keep track of your solved problems and get motivated to solve more.

Pick the best suitable problem

By hovering on a problem you can see the number of perfect scorers on that problem in official contest, also, the percentage of points scored on that problem. Using those you can pick the best suitable problem for yourself!

Keep track of others

You can share your checklist with your friends and they can share theirs too. Keep track of each other and solve more and more interesting problems together!