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Switching on the Lights

USACO · 2015 · December · silver-1

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simulation

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

sample trace

Switching on the Lights: simulation walkthrough

Switching on the Lights: use the linked editorial?s simulation idea on the published sample, then verify the displayed output.

Published input3 6 1 1 1 2 2 1 2 2 1 1 1 3 2 3 3 1 1 3 1 2 1 3 2 1modelAlgorithm ideaRepresent the current situation as a state and apply each operation in the exact order given by the task.task resultExpected output5
  1. 1

    Initialize

    Record the starting values from the sample input.
  2. 2

    Apply

    Perform each required operation and update the state.
  3. 3

    Observe

    Read the final state or event count required by the task.
  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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