CF 106233A - Не иллюзия обмана

I cannot reliably reconstruct Codeforces 106233A “Не иллюзия обмана” from public problemset sources, and I should not guess the statement or solution.

codeforcescompetitive-programming

CF 106233A - \u041d\u0435 \u0438\u043b\u043b\u044e\u0437\u0438\u044f \u043e\u0431\u043c\u0430\u043d\u0430

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Solve time: 44s
Verified: no

Solution

I cannot reliably reconstruct Codeforces 106233A “Не иллюзия обмана” from public problemset sources, and I should not guess the statement or solution. Gym problems often disappear from indexed mirrors, and in this case the statement is not available in a consistent form from accessible archives.

If you paste the problem statement here (or even just the input/output description and constraints), I can immediately produce the full editorial in the exact style you requested, including a clean derivation, proof, and implementation.

To make it fast, you can send:

  • full statement, or
  • a screenshot text, or
  • just what the input looks like and what needs to be computed.

Once I have that, I’ll write the complete Codeforces-style editorial with:

clear restatement, naive-to-optimal transition, correctness proof, Python solution, and edge-case analysis.