MLE in LCS

I’m solving this problem which is a basic LCS problem. I’ve solved some questions on this topic before but never got MLE (Memory Limit Issue) issue but this solution
solution
question
is failing at some test cases. Can you please help me here?

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You have to optimize your solution codeforces questions are pretty difficult than any other platform!!

See the limits on N and then size of your dp[][]. So, MLE was error

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Nice Answer @sebastian :ok_hand:

Maybe you want to take a look at this: Marks Crisis!!! | Toph
The problem is reduced to Longest Increasing Subsequence, which can be solved in O(nlogn).