Where can I find an Iranian test answer?

Question

Ask who has the official answer to the Iranian third round test question, or the official link, although this is not a mathematical problem, but this problem has been plagued by me, and every time I see the Iranian third round of mathematics test questions published on the aops, I find many questions very difficult. I can't do it, although some of the questions are discussed, but they are not correct. I hope someone can help me,I hope we have Iranian friends here. Thank you.