CF 105786B - Alya and Permutation Revisited

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Solution

Sure. Please provide the Codeforces problem statement (or a link, problem name, and constraints), and I’ll write a detailed competitive programming editorial covering:

Problem restatement and observations
Key insights / intuition
Proof of correctness
Algorithm explanation
Complexity analysis
Implementation details
Reference C++17 solution (if desired)

I’ll format it like an official Codeforces editorial.