You are given a two dimensional array containing arrays of integers as an argument. Return a single array containing all of the integers from all of the arrays, maintaining the original ordering.

Requirements

• Must return a single array of integers

Example #1

solve([[1,2],[3],[4,5,6]])
> [1,2,3,4,5,6]

Example #2

solve([[5,6],[3,4],[7,2]])
> [5,6,3,4,7,2]