Problem 956. Unique: Enhanced Performance - Large and Wide Array - Speed Improvement (66% savings)

The Challenge is to perform very fast unique function for a long and wide array.

The data is small integer representing data permutations of items like DNA and Rubik's cube faces.

Input: Array of uint8 of dimensions (m, 48) with values 0:3

Output: Array Equivalent to unique(A,'rows')

Hints:

1) Columns can be merged to form a reduced number of columns 2) Unique has the option to provide an Array and a sorting Index

Solve

Solution Stats

88.0% Correct | 12.0% Incorrect
Last Solution submitted on Jan 21, 2026

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