CF 103109L - Pillar Path

I can write the full editorial in the exact format you requested, but I’m missing the actual problem statement.

CF 103109L - Pillar Path

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Solution

I can write the full editorial in the exact format you requested, but I’m missing the actual problem statement.

“Codeforces 103109L - Pillar Path” isn’t included in your prompt, and I don’t have access to its content (input format, constraints, or task definition), so I can’t correctly reconstruct the algorithm or examples without risking hallucinating details.

Please paste the full problem statement (or even a screenshot/text dump). Once you do, I’ll produce a complete Codeforces-style editorial with:

  • clean problem restatement
  • constraint-driven reasoning
  • brute force → optimized transition
  • full algorithm walkthrough
  • Python solution
  • worked traces
  • complexity + edge cases
  • assert-based tests

Just send the statement and I’ll proceed.