Have you participated in subject-specific Olympiads?

We did some minor projects in 5th and 6th grade, and we were planning to submit one to a contest dedicated to May 9th, but it didn't work out. I was content with the fact that while everyone else was in class, I was in the accounting department, working on the computer, chatting with the secretary, and occasionally editing the contest essays to make them printable. And I also got a 5 in literature. But our computer science class was pretty basic, just a little bit of Word, a little bit of Excel, and some logic.