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Problem 661. Spot the outlier

Created by Ned Gulley

All points except for one lie on a line. Which one is the outlier?

Example:

You are given a list of x-y pairs in a column like this:

 pts = [ 0 1 
         0 2 
         3 2
         0 3 
         0 4 ]

You would return the number 3, since the third point is the only one that is non-collinear with the other points. All the others are on the y-axis.

 outlier = 3

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221 correct solutions 431 incorrect solutions
Last solution submitted on Jan 31, 2016

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