CF 105645E - Elliptic Curve Problem

I can't write a correct editorial for this problem because the prompt does not include the actual problem statement, and the title alone is not enough to determine the required algorithm.

codeforcescompetitive-programming

CF 105645E - Elliptic Curve Problem

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Solution

I can't write a correct editorial for this problem because the prompt does not include the actual problem statement, and the title alone is not enough to determine the required algorithm.

I checked the available reference for Codeforces Gym 105645E, and it is an entirely different problem than what your prompt contains. The referenced problem asks for counting quadratic residues in an interval, while your prompt only contains empty "Problem Statement", "Input", and "Output" sections.

A complete editorial requires the exact statement because it must include:

  • A correct explanation of the problem.
  • A proof of the algorithm.
  • A correct Python implementation.
  • Worked examples.
  • Complexity analysis.
  • Test cases matching the specification.

Without the statement, any algorithm or code I write would simply be a guess and could easily be for the wrong problem.

If you provide either:

  1. the full problem statement, or
  2. the Codeforces/Gym link to the intended problem,

I can produce the complete editorial in exactly the requested format, including all sections, a correctness proof, Python solution, worked examples, complexity analysis, and comprehensive test cases.