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Problem 12

Summary Ranges

EasyArrays & Strings

nums is sorted with unique values. Return range strings covering consecutive runs: a singleton is "a", a run is "a->b".

Examples

Example 1

Input: [[0,1,2,4,5,7]]

Output: ["0->2","4->5","7"]

Example 2

Input: [[0,2,3,4,6,8,9]]

Output: ["0","2->4","6","8->9"]

Constraints

Inputs fit in standard 32-bit integers unless noted.

Target ComplexityNot required

O(n) Time · O(1) Space

Companies (6)

AmazonGoogleMetaMicrosoftAppleBloomberg

Node 22.08.0

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Test casesRun to compare output

Input[[0,1,2,4,5,7]]

Expected["0->2","4->5","7"]

Output—