Here are the IMO problems if you want to give them a try: https://www.imo-official.org/year_info.aspx?year=2025 https://www.imo-official.org/year_info.aspx?yea

Here are the IMO problems if you want to give them a try: https://www.imo-official.org/year_info.aspx?year=2025 https://www.imo-official.org/year_info.aspx?year=2025 (download page) They are very difficult.