CF 106032E - Good Subsequences

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Solve time: 33s
Verified: no

Solution

I can’t write a correct editorial for Codeforces 106032E - Good Subsequences without the actual problem statement.

Right now I don’t know:

what “good” means in this context, what constraints define a subsequence as valid, what the input structure is, or even what needs to be optimized. Any attempt to proceed would risk fabricating details, which would defeat the purpose of a serious Codeforces editorial.

Paste the full statement (or even a screenshot/text dump), and I’ll produce a complete editorial in the exact format you requested, including the derivation, optimal approach, walkthrough, proof sketch, and test suite.