very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
Return 'on' or 'off'
Find the next prime number
Perfect Square or not
Reverse a matrix
Fast 1-D Convolution (valid shape)
Group-wise Euclidean distance
Cody meets Xiangqi: foresee the unseen (Part 1)
Words Count: A String Array Approach
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