CF 105999K - Koala Harris VS Donald Trunk

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Solve time: 28s
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Solution

I’m missing the actual problem statement for Codeforces 105999K - Koala Harris VS Donald Trunk (your prompt has empty “Problem Statement / Input / Output” sections).

Without that, I can’t reliably reconstruct the task, constraints, or intended solution path, and anything I write would be guesswork rather than a correct editorial.

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