Given a row vector of integers with repeating values - here not all repeating values will occur in a single continuous run, create an array that is the cumulative count of the unique values -
%% Example 1
input = [4 5 5 6 11 11 11 11 20 20 20 20 20 20 20 35 5 5];
output = [1 1 2 1 1 2 3 4 1 2 3 4 5 6 7 1 1 2];
%% Example 2
input = [33 33 33 22 22 11 33 33 33 22 22 11];
output = [1 2 3 1 2 1 1 2 3 1 2 1];
Only vectorized solutions will be accepted. Check the test suite for banned functions.
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Last Solution submitted on Dec 13, 2025

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William George Berken Dyuman Joshi Christian Schröder

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