Return the number of days in a given month in 2017. If the input is not a valid month number, return -1.
Input: m = 1
Outpu: d = 31
Input: m = 2
Output: d = 28
Input: m = 13
Output: d = -1
You cannot use IF statements
Inner product of two vectors
"Low : High - Low : High - Turn around " -- Create a subindices vector
Multiply a column by a row
Rotate a Matrix
Find the average of a random sequance
Remove the first, third and fifth rows of a matrix
Separate even from odd numbers in a vector - without loops
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