CF 102979B - Best Meeting Places

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Solve time: 41s
Verified: no

Solution

The problem statement is missing, so there isn’t enough information to reliably reconstruct what Codeforces 102979B (“Best Meeting Places”) is asking.

For an editorial like this, even small details matter a lot: whether it is grid-based or graph-based, whether distance is Manhattan or shortest path, whether there are obstacles, and what exactly must be optimized (single meeting point, multiple queries, sum vs max distance, etc.). Different interpretations lead to completely different solutions, from median math to BFS multi-source or DP.

If you paste the full statement (or even just the input/output description and constraints), I’ll produce the complete Codeforces-style editorial exactly in the format you specified, including the walkthrough, proof sketch, Python solution, worked examples, and edge-case analysis.