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: [20, 46, 12, 22, 35, 6, 4, 39, 14, 26, 10, 34, 41, 31, 43, 25, 7, 9, 28, 42], target=10

SOLUTION: [6, 4]

PROBLEM: [2, 35, 38, 29, 34, 36, 4, 19, 33, 27, 14, 32, 5, 45, 1, 11, 17, 10, 25, 15], target=72

SOLUTION: [38, 34]

PROBLEM: [1, 35, 20, 7, 16, 47, 41, 36, 24, 3, 38, 5, 13, 31, 2, 23, 14, 39, 6, 19], target=40

SOLUTION:
[16, 24]