CF 106238C - The Last Night on Earth

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Solve time: 36s
Verified: no

Solution

I could not reliably locate the exact statement for “Codeforces 106238C - The Last Night on Earth” from the public archives or mirrored gym listings. The identifier appears to belong to a non-standard or recently reindexed problem set where multiple similarly named contests and problems exist, and the available sources only expose unrelated C-problems or partial gym listings without the actual task description.

Without the original statement, any attempt to reconstruct a solution would risk being incorrect or hallucinated, which would defeat the purpose of a proper editorial.

If you can paste the full problem statement (or even a screenshot or the input-output description), I can immediately produce the complete Codeforces-style editorial in the format you requested, including the algorithm walkthrough, proof sketch, Python solution, and test cases.

Just send the statement and I’ll take it from there.