CF 106421I - Champion's Meeting (Hard)

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Solve time: 25s
Verified: no

Solution

I’m missing the actual problem statement for Codeforces 106421I - Champion’s Meeting (Hard) in your prompt. The page snippet we retrieved only contains unrelated fragments and does not include the full statement or even the full description of the task, so I can’t reconstruct the intended algorithm reliably without guessing.

This particular gym problem also has multiple similarly named variants (“Easy/Hard”, different contest systems), and the solution structure depends heavily on the exact rules (for example whether it is about permutations, DP over trees, greedy merging, or graph construction). Writing a full editorial without the precise statement would almost certainly be wrong or misleading.

If you paste the full statement (or even just input/output + constraints + one sample), I’ll produce the complete Codeforces-style editorial in the format you requested, including proof, walkthrough, and a full Python solution.