Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.
test 8 is not a symmetric matrix, is it a projector matrix?
Sorry about that one. I've removed that test case. I don't know how long it will take for the re-scoring to propagate, though.
Twins in a Window
Set the array elements whose value is 13 to 0
Find difference of two set as per example
Divisible by 15
Stress-Strain Relationship 1
Lights Out 24 - m x n, x moves
Legend of Zelda - Rupee Count
Lights Out 28 - 3x3x3, x moves
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