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#749 Completion Order of Batched Requests

medium

A dashboard loads its widgets' data with at most limit requests in flight, starting requests in index order (the first limit at time 0, then each next one as soon as any request finishes). Request i takes durations[i] ms.

Widgets render as soon as their data arrives. Write completionOrder(durations, limit) that returns the request indexes in the order they finish. Requests that finish at the same time are listed by index, smallest first.

Example 1

Input: durations = [300,100,200,100,400], limit = 2
Output: [1,0,2,3,4]

Finish times are 300, 100, 300, 400, 700. Requests 0 and 2 tie at 300, so 0 comes first.

Example 2

Input: durations = [5,4,3], limit = 3
Output: [2,1,0]

All start together, so the shortest finishes first.

Constraints

  • 0 <= durations.length <= 10^4, 1 <= durations[i] <= 10^4
  • 1 <= limit <= 100
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