Problem 43219. Modified run-length companion vector

Given a vector x, return a vector that indicates the run length of any value in x. Each element in output vector shows how many times the corresponding element in x has appeared.

Example:

 Input  x = [5 3 3 1 0 9 9 4 4 4 4 5 1 2 2]
 Output r = [1 1 2 1 1 1 2 1 2 3 4 2 2 1 2]
Solve

Solution Stats

60.0% Correct | 40.0% Incorrect
Last Solution submitted on Dec 02, 2025

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length matrix vector

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