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Rental Service

USACO · 2018 · January · silver-2

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greedy · prefix-sums · sorting

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

sample trace

Rental Service: greedy walkthrough

Rental Service: use the linked editorial?s greedy, prefix sums idea on the published sample, then verify the displayed output.

Published input5 3 4 6 2 4 7 1 10 25 2 10 15 15 250 80 100 40modelAlgorithm ideaProcess choices in the order justified by the editorial and maintain the invariant that each accepted choice remains safe.task resultExpected output725
  1. 1

    Order

    Arrange candidates by the criterion used by the task?s greedy strategy.
  2. 2

    Choose

    Accept the next locally safe option while preserving the feasibility invariant.
  3. 3

    Finish

    Read the accumulated result and check it against the sample 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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