tbquan08hanoi's blog

Substring Reversal
By tbquan08hanoi, history, 7 months ago, In English

Hi Codeforces community!

I was doing a problem like this: Given a string s, reverse a substring of it in each query, and print the final string after all queries. Constraints are 1 ≤ |S|, Q ≤ 10^5. I have seen many solutions using tree algorithms, is it possible to solve this problem without using tree algorithms?

Thanks!

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7 months ago, # |
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  1. It's actually a tree algorithm inside, but you can use __gnu_cxx::rope for this task (so you don't actually need to do anything by yourself)
  2. Default split-rebuild sqrt decomposition
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7 months ago, # |
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I found this code which solves CSES — Subtring Reversals using some kind of sqrt blocking

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7 months ago, # |
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prefix sum

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