Problem 532. Return unique values without sorting

Aurelien Queffurust

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If the input vector A is [42 1 1],
the output value B must be the unique values [42 1]
The values of B are in the same order as A

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2169 Solutions

999 Solvers

Last Solution submitted on Jan 31, 2026

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3 Comments

@bmtran (Bryant Tran) on 27 Mar 2012

perhaps you should specify that y is in the order of the first occurence of each unique element of x

Peter Wittenberg on 6 Oct 2012

This would be a better problem if unique and sort functions were not allowed

Jihye Sofia Seo on 10 Feb 2017

Nice problem!

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