Can anyone give me recommendation of codeforces' past contest? What I need is some sort of contest where high mathematical analysis is required, even the easiest problem need some sort of understanding which people without higher mathematical experience will have a hard time to grasp it. Btw this is for my self-training.
hope for maths
I recommend you round Codeforces Round 308 (Div. 2) if you need harder math problems I recommend you to solve IMO problems : IMO :)
I recommend Round 319...
You have great sense of humor. Here, take my upvote.
Or maybe he's the round writer.
Just open project euler and skip first 50-60 problems. There are a lot of very hard mathematical problems on this portal.