Problem · Array

Shortest Distance on a Circular Bus Route

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Problem statement

For this exercise, assume a bus route has n stops arranged in a circle. The array distance contains the distance from stop i to stop (i + 1) mod n.

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Examples

Example 1

distance = [1,2,3,4]start = 0destination = 2return = 3

Clockwise travel from stop 0 to stop 2 costs 1 + 2 = 3. The other direction costs 4 + 3 = 7, so the answer is 3.

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Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 1 more worked example, explained
  • Guided hints and editorial
  • Run your code on real test cases
$9/month

Pro subscription, billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week