| ||Given a int a, return the number of integers between L and R, inclusive, that are divisible by at least one of the elements in a.
|Parameters:||int, int, int|
|Method signature:||int numDivisible(int L, int R, int a)|
|(be sure your method is public)|
|-||L will be between 1 and 1000,000,000, inclusive.|
|-||R will be between L and 1000,000,000, inclusive.|
|-||a will contain between 1 and 18 elements, inclusive.|
|-||Each element of a will be between 1 and 1000,000,000, inclusive.|