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
Find the sum of all the numbers of the input vector
Return the 3n+1 sequence for n
Is this triangle right-angled?
Vectors counting by 2
How many Integers?
Approximate the cosine function
Find the starting index of a consecutive condition
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