CF 103921C - Earthbending years

I can’t write a correct editorial for this yet because the actual problem content is missing. “Codeforces 103921C - Earthbending years” is referenced, but there’s no statement, no input/output description, and no constraints.

codeforcescompetitive-programming

CF 103921C - Earthbending years

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Solve time: 31s
Verified: no

Solution

I can’t write a correct editorial for this yet because the actual problem content is missing.

“Codeforces 103921C - Earthbending years” is referenced, but there’s no statement, no input/output description, and no constraints. Without that, any solution would be a guess, and that would defeat the point of an editorial that a reader can re-derive and trust.

If you paste the full problem statement (or even a screenshot / raw text), I’ll turn it into a complete Codeforces-style editorial in the exact format you requested, including:

  • clean problem restatement
  • constraint-driven reasoning
  • brute force → optimization path
  • full algorithm walkthrough with invariants
  • Python solution
  • worked traces, complexity, and edge cases

Just send the statement and I’ll proceed.