What is the most important topics that i have to focus on to reach expert?
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I don't know but lately it seems like codeforces likes to give out math and dynamic programming topics.
Thank you for your advice :)
Greedy algorithm and binary search.
Thank you for your advice :)
Particularly DFS/BFS, bin search, dp, data structures, greedy and of course math. It is obvious that math here is the most important.
Thank your for your help :)
You can do some DP problems,and you need to improve your math skill too.
Digit bitmask DP, Mergesort tree, lichao segment tree, segment tree beats and treaps are very important data structures you must know to get to 1600
You needn't learn these advanced topics to reach blue
get to blue first, hardstuck cyan lol
wait bro i think the guy is right because this topics that you mentioned are more advanced than expert level
but of course i will take your advice and learn about them :)
Basic data structures.
Thank you for your help :)