CF 106139A - Customized Shortest Path

I can’t reliably write a correct editorial for “Codeforces 106139A - Customized Shortest Path” from what you provided, because the actual problem statement (graph definition, what “customized” means, constraints, and query format) is missing.

codeforcescompetitive-programming

CF 106139A - Customized Shortest Path

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Solution

I can’t reliably write a correct editorial for “Codeforces 106139A - Customized Shortest Path” from what you provided, because the actual problem statement (graph definition, what “customized” means, constraints, and query format) is missing.

Right now the prompt only contains “A”, so anything I produce would be guessing the rules of the problem, and that would very likely lead to a completely wrong solution and misleading editorial.

If you paste the full statement (or even just input/output format + key rules), I’ll write the complete Codeforces-style editorial exactly in the structure you requested, including algorithm intuition, walkthrough, complexity, tests, and edge cases.