Hi Codeforces! I'm 14 and am sitting the British Informatics Olympiad this January, and want to get ready for it. I just want to know what the corresponding Codeforces difficulty of a BIO round 1 question would be (maybe like q3 or 2 cause 1 is easy) and also how I can best prepare (topics and stuff) for it. Thanks!
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Question 2s aren't really comparable to Codeforces problems since it's just pure implementation with no need to think of the algorithm usually. To prepare for those just get really familiar with whatever programming language you want to use.
Every question 3 for the past 10 years has been either combinatorics (usually involving DP), or transforming the problem into a graph and running BFS. Just practice those two topics and it is very likely a similar problem will turn up this year (although you do get the rare oddity like 2013). I would estimate the difficulty to be around 1500 on average although you get a particularly difficult problem every now and then.
sreesh_56