CF 105909C - 年少的誓约

I can’t reliably write a correct Codeforces-style editorial for 105909C - 年少的誓约 without the actual problem statement. Right now I only have the title, but no information about what the input/output describe or what the task is.

codeforcescompetitive-programming

CF 105909C - \u5e74\u5c11\u7684\u8a93\u7ea6

Rating: -
Tags: -
Solve time: 26s
Verified: no

Solution

I can’t reliably write a correct Codeforces-style editorial for 105909C - 年少的誓约 without the actual problem statement.

Right now I only have the title, but no information about what the input/output describe or what the task is. Any attempt to “reconstruct” it would be guessing, and that would produce a misleading editorial.

If you paste the full problem statement (or even just the input/output description and constraints), I’ll write the complete deep-dive editorial in the exact format you requested, including:

  • a clean restatement in plain language
  • intuition from brute force to optimal
  • full algorithm derivation
  • Python implementation
  • worked traces and edge cases
  • complexity proof

Send the statement and I’ll take it from there.