CF 103861G - Check Pattern is Bad

The prompt is missing essential information needed to write a correct editorial. The sample input and sample output in the statement are corrupted and do not line up, and there is no complete problem specification.

codeforcescompetitive-programming

CF 103861G - Check Pattern is Bad

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Solve time: 30s
Verified: no

Solution

The prompt is missing essential information needed to write a correct editorial.

The sample input and sample output in the statement are corrupted and do not line up, and there is no complete problem specification. In particular, the provided text contains:

  • A malformed Sample Input/Sample Output section where the test count and test cases are mixed together.
  • Empty "## Input" and "## Output" sections.
  • No official sample mapping between inputs and outputs.
  • No guarantee about whether the shown sample boards correspond to one, two, or three test cases.

Without the complete original statement, I cannot derive or verify the algorithm, prove correctness, or produce a guaranteed-correct implementation. Doing so would require guessing details that may change the solution.

Please provide either:

  1. the full original Codeforces statement for 103861G - Check Pattern is Bad, or
  2. the official problem link, or
  3. the complete Input/Output specification together with the correctly formatted sample input and sample output.

Once I have the complete statement, I'll produce the full editorial in the requested format, including:

  • Problem Understanding
  • Approaches (brute force and optimal)
  • Algorithm Walkthrough with proof sketch
  • Complete Python 3 solution
  • Detailed code explanation
  • Worked examples with trace tables
  • Complexity analysis
  • Assert-based test suite
  • Edge case analysis