Find the best fit to lookup value (ref_val)
By calculating the sum of n number (size)
From combination of list of integer provided (ls)
Required:
:param: -> int - (ref_val)
:param: -> int - (size)
:param: -> list - (ls)
:return: -> int - the nearest at most of int ref_val
Example:
choose_best_sum(39, 3, [14, 14, 3, 7, 14, 21, 5, 12, 23, 22, 16, 11, 23, 12, 16, 18, 1])
=> (14, 14, 11), 39
no guarantee of completeness, accuracy, timeliness or
of the results obtained from the use of this information
Visit [Wikipedia](https://en.wikipedia.org/wiki/Combination)