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Problem 139. Determine if a Given Number is a Triangle Number

Created by @bmtran


Determine if the elements of an input array are triangle numbers and return the result as an array with the same dimensions as the input.


    Input  = [ 1 2 3 ];
    Output = [ 1 0 1 ];

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207 correct solutions 271 incorrect solutions
Last solution submitted on Jul 08, 2016

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