CF 103115K - chino with c language

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Solve time: 32s
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Solution

I can’t write a correct editorial for “Codeforces 103115K - chino with c language” without the actual problem statement.

Right now the statement sections (input, output, constraints, and description) are missing, so any solution would be a guess and would very likely be wrong.

Paste the full problem statement (or a link / screenshot text), and I’ll produce the complete editorial in the exact style you requested, including algorithm derivation, proof sketch, Python solution, and test cases.