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: [30, 41, 28, 8, 42, 4, 39, 16, 36, 33, 13, 32, 35, 34, 6, 49, 27, 29, 40, 44], target=28

SOLUTION: []

PROBLEM: [7, 12, 4, 2, 39, 33, 23, 38, 14, 44, 16, 49, 27, 5, 31, 47, 43, 24, 41, 18], target=81

SOLUTION: [38, 43]

PROBLEM: [24, 29, 9, 12, 2, 18, 11, 7, 31, 6, 30, 14, 3, 41, 13, 33, 21, 47, 45, 4], target=22

SOLUTION:
[9, 13]