TASK DEFINITION: You are given a list of integers and an integer target, return a list of a pair of numbers in any order such that they add up to target. If there is no such pair of numbers, then return an empty list
PROBLEM: [29, 23, 1, 43, 39, 31, 6, 44, 40, 20, 45, 19, 10, 21, 16, 34, 14, 26, 36, 12], target=47

SOLUTION: [31, 16]

PROBLEM: [7, 31, 32, 11, 46, 40, 15, 9, 13, 45, 48, 44, 33, 6, 5, 27, 17, 43, 18, 42], target=56

SOLUTION: [11, 45]

PROBLEM: [16, 42, 44, 30, 20, 19, 12, 48, 21, 34, 5, 4, 46, 49, 25, 8, 9, 35, 28, 17], target=90

SOLUTION:
[42, 48]