CF 106186B - A King With No Name

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Solve time: 1m 59s
Verified: no

Solution

Sure. Please provide the Codeforces problem statement (or a link/title, constraints, and examples), and I’ll write a detailed editorial in a competitive programming style.

I’ll structure it like a typical CF editorial:

Problem restatement / intuition
Key observations
Derivation of the algorithm
Proof of correctness
Complexity analysis
Implementation details
Reference solution (usually C++17)

If you want a specific style (e.g., Div. 2 A/B concise, Div. 1 hard with deeper proof, or educational round style), mention that too.