Write a function to find the 5th root of a number.
It sounds easy, but the typical functions are not allowed (see the test suite), so you'll need to find a non-standard method to solve the problem.
Matrix indexing with two vectors of indices
Generate a vector like 1,2,2,3,3,3,4,4,4,4
03 - Matrix Variables 4
Sum of the Matrix Elements
Pernicious Anniversary Problem
Lights Out 21 - 6x6, x moves
Lights Out 11 - 5x5, with wrapping, x moves
Lights Out 5 - 5x5, 10 moves
Rumis Scorer 4
Lights Out 18 - 3x3, 3 moves
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