CF 1056411 - Речные прогулки

I can absolutely write a full Codeforces editorial in that format, but I need the actual problem statement first. The prompt only contains: - Problem: Codeforces 1056411 - «Речные прогулки» - Empty Problem Statement, Input, and Output sections.

codeforcescompetitive-programming

CF 1056411 - \u0420\u0435\u0447\u043d\u044b\u0435 \u043f\u0440\u043e\u0433\u0443\u043b\u043a\u0438

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Solution

I can absolutely write a full Codeforces editorial in that format, but I need the actual problem statement first.

The prompt only contains:

  • Problem: Codeforces 1056411 - «Речные прогулки»
  • Empty Problem Statement, Input, and Output sections.

Without the statement, I cannot reconstruct:

  • what the input represents,
  • what must be computed,
  • the constraints,
  • the intended algorithm,
  • a correct proof,
  • a working Python solution,
  • worked examples,
  • or valid test cases.

I don't want to invent a problem, because that would produce an incorrect editorial.

Please provide one of the following:

  1. The full problem statement (preferred), or
  2. The Codeforces contest/problem link, or
  3. The Russian statement copied into the chat.

Once I have the statement, I'll produce the complete editorial with all of the requested sections:

  • Problem Understanding
  • Approaches
  • Algorithm Walkthrough
  • Python Solution
  • Worked Examples
  • Complexity Analysis
  • Test Cases
  • Edge Cases

following all of your formatting and style requirements.