i think this problem needs more test case
Return the 3n+1 sequence for n
Finding Perfect Squares
Counting in Finnish
Return elements unique to either input
Divisors of an integer
Given an unsigned integer x, find the largest y by rearranging the bits in x
Predicting life and death of a memory-less light bulb
letter yes yes & letter no no
Distance walked 3D
Check if sorted
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