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Problem 795. Joining Ranges

Created by Dirk Engel

You are given a n-by-2 matrix. Each row represents a numeric range, e.g.

x = [0 5; 10 3; 20 15; 16 19; 25 25]

contains ranges [0 5], [10 3], [20 15], [16 19], and [25 25]. Note that the first column does not always contain the smaller number. Join all overlapping ranges and return the sorted (both columns and all rows must be sorted) matrix of joined ranges

y = [0 10; 15 20; 25 25]

i.e. ranges [0 5] and [10 3] are combined to [0 10], range [16 19] is completely overlapped by [15 20] and [25 25] is kept because it is a separate range.

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Solution Statistics

32 correct solutions 65 incorrect solutions
Last solution submitted on Sep 17, 2014

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