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Hi, is there a reason why my submission* got accepted meanwhile my rough estimate for time complexity is O(n^3), because i did a dfs and for every node i calculate a subset sum of each subtree size. Or is this because of weak tc? thanks
*) https://mirror.codeforces.com/contest/1856/submission/290385616
Can anyone give me advice on how to learn CP quickly? I have read several catalogs that talk about this, but I want to know, is there anything you wish you knew earlier?
