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Lonely Photo

USACO · 2021 · December · bronze-1

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strings

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

sample trace

Lonely Photo: strings walkthrough

Lonely Photo: use the linked editorial?s strings idea on the published sample, then verify the displayed output.

Published input5 GHGHGmodelAlgorithm ideaTreat the text as an ordered sequence of characters and use the editorial?s matching or prefix/suffix property to avoid rescanning.task resultExpected output3
  1. 1

    Scan

    Process characters in order while maintaining the relevant prefix or match state.
  2. 2

    Match

    Use the editorial?s string property to detect or extend a valid pattern.
  3. 3

    Finish

    Convert the resulting match or transformed sequence into the requested output.
  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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