CF 106508L - Matrix Construction

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Solve time: 30s
Verified: no

Solution

I cannot safely reconstruct the exact statement of “Codeforces 106508L - Matrix Construction” from the information available here. The searches are returning a different gym problem with a similar name, but it does not match the Codeforces contest problem ID, and there is no consistent description for 106508L itself.

Writing a full editorial without the correct statement would force assumptions about the constraints and requirements, and that would very likely produce a misleading solution.

If you paste the actual problem statement (or even just the key rules and constraints), I can produce the full Codeforces-style editorial exactly in the format you requested, including the derivation, optimal construction, proofs, and implementation details.