Where can you get questions for international informatics olympiad?

You can find questions for the International Olympiad in Informatics (IOI) on its official website, where past problem sets and contest materials are archived. Additionally, platforms like Codeforces, AtCoder, and other competitive programming websites often host similar problems. Participating in local or regional contests can also provide valuable practice. Lastly, online resources like GitHub repositories and forums dedicated to competitive programming may offer curated collections of IOI-style questions.