CF 105615I - 晶体化

I can’t reliably reconstruct Codeforces 105615I - 晶体化 from external sources or partial metadata alone, and I don’t want to guess a problem and give you a fake editorial. Right now I only know the title, not the actual model (grid, graph, DP, geometry, etc.

codeforcescompetitive-programming

CF 105615I - \u6676\u4f53\u5316

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Solve time: 33s
Verified: no

Solution

I can’t reliably reconstruct Codeforces 105615I - 晶体化 from external sources or partial metadata alone, and I don’t want to guess a problem and give you a fake editorial.

Right now I only know the title, not the actual model (grid, graph, DP, geometry, etc.), so any “complete solution” would be speculation and very likely wrong.

If you paste the full statement (or even a screenshot / PDF text), I can immediately write the full Codeforces-style editorial in the format you requested, including:

  • clean restatement of the problem
  • optimal idea derivation from brute force
  • full correctness argument
  • Python implementation
  • worked traces and edge cases

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