CF 105858I - Mine sweeper

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Solve time: 24s
Verified: no

Solution

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

Problem restatement
Key observations
Derivation of the algorithm
Proof of correctness
Complexity analysis
Implementation details
Reference solution (if you want, in C++17)