Problem 162. High school cafeteria

Created by the cyclist

Given an input vector of positive integers, return a row vector with the primes first (in order) and the composites next (also in order).

The number 1 is neither prime nor composite. Put it with the composites for this problem.

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48 solvers submitted 139 solutions (2.9 solutions/solver).

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3 Comments

Alfonso Nieto-Castanon on 29 Jan 2012

need to add non-sorted test samples (e.g. [3,2,1])?

Tom on 26 Feb 2013

It looks like 1 is being incorrectly sorted as a composite number in the testcases.

the cyclist on 27 Feb 2013

I somehow Alfonso's older comment until I saw Tom's newer one. Alfonso: I've added a non-sorted test sample, and had the problem rescored. Tom: 1 is neither prime nor composite. I've added instructions on how to handle that.

Problem 162. High school cafeteria

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48 solvers submitted 139 solutions (2.9 solutions/solver).

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