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Stuck in a Rut

USACO · 2020 · December · bronze-3

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sorting · simulation

The organizer’s problem statement is available at the official source link.

sample trace

Stuck in a Rut: sorting walkthrough

Stuck in a Rut: use the linked editorial?s sorting, simulation idea on the published sample, then verify the displayed output.

Published input6 E 3 5 N 5 3 E 4 6 E 10 4 N 11 2 N 8 1modelAlgorithm ideaSort by the task-relevant key so the ordering exposes candidates that can be checked locally.task resultExpected output5 3 Infinity Infinity 2 5
  1. 1

    Order

    Sort items by the comparison key used by the task.
  2. 2

    Scan

    Inspect the ordered neighbors or groups and update the candidate result.
  3. 3

    Finish

    Use the final aggregate or selected item as the answer.
  4. 4

    Verify the sample

    Use the published sample output to check the result of this idea on the displayed input.
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