When the input is certainly not the global variable z, your function must return false. Otherwise return true. All inputs & variable values will be scalar.
Find the alphabetic word product
Check if sorted
First non-zero element in each column
Find the elements of a matrix according to a defined property.
Comparison of floating-point numbers (singles)
Anyone for tennis? Your chances of winning a (standard) game
Code breaker, Part I: Operation Phoenix
Seemingly impossible problem
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