CF 106042A - Squares

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Solve time: 27s
Verified: no

Solution

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

I can structure it like a typical CF editorial:

Problem restatement / intuition
Key observations
Derivation of the algorithm
Why the greedy/DP/data structure works
Complexity analysis
Implementation details
Common pitfalls
Reference C++17 solution (if you want)

Send the problem whenever you're ready.