CF 103409I - PTSD

I don’t have the actual statement for Codeforces 103409I “PTSD” available from your prompt, and without it I can’t responsibly derive the algorithm, constraints, or edge cases.

codeforcescompetitive-programming

CF 103409I - PTSD

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Solve time: 27s
Verified: no

Solution

I don’t have the actual statement for Codeforces 103409I “PTSD” available from your prompt, and without it I can’t responsibly derive the algorithm, constraints, or edge cases. Anything I write here would be guesswork, and that would defeat the point of a correct editorial.

Paste the full problem statement (or even a screenshot/text dump), and I’ll turn it into a complete Codeforces-style editorial in the exact format you specified, including the brute-force reasoning, optimal reduction, full walkthrough, proofs, and test cases.