Problem 321. polar inertia

given locations of a set of unit masses on complex plane, find polar moment of inerta about the origin. for example output 4 if input [0 1 1+1i 0-1i]

Solve

Last Solution submitted on Dec 18, 2025

@bmtran (Bryant Tran) on 15 Feb 2012

you should ease up numerically on equality, so my solution works :)

Rafael S.T. Vieira on 16 Oct 2020

The polar inertia is the sum of the squared distances of all points from the origin. https://en.wikipedia.org/wiki/Polar_moment_of_inertia

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