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Mooball Teams III

USACO · 2024 · January · platinum-3

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trees · sorting · data-structures

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

sample trace

Mooball Teams III: trees walkthrough

Mooball Teams III: use the linked editorial?s trees, sorting idea on the published sample, then verify the displayed output.

Published input2 1 2 2 1 3 1 1 2 2 3 3 3 1 1 2 3 3 2 40 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40modelAlgorithm ideaUse the rooted tree structure: each subtree is a self-contained region, and parent/child summaries support the requested query.task resultExpected output2 10 12 441563023
  1. 1

    Root

    Choose the root and record parent, child, and subtree relationships.
  2. 2

    Combine

    Process child subtrees or ancestor paths using the task?s required summary.
  3. 3

    Answer

    Translate the relevant tree region into the requested value or 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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