CF 106210D - 师出同门

I can’t reliably write a correct editorial for this yet because the actual problem statement for “Codeforces 106210D - 师出同门” is not included in your message (it only shows a placeholder “D”).

codeforcescompetitive-programming

CF 106210D - \u5e08\u51fa\u540c\u95e8

Rating: -
Tags: -
Solve time: 32s
Verified: no

Solution

I can’t reliably write a correct editorial for this yet because the actual problem statement for “Codeforces 106210D - 师出同门” is not included in your message (it only shows a placeholder “D”).

Without the rules, input/output meaning, and constraints, any solution I write would be guesswork and very likely wrong.

If you paste the full statement (or even just the core description and constraints), I’ll produce the complete Codeforces-style editorial in the exact format you specified, including algorithm derivation, proof sketch, Python solution, and test cases.