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: [26, 3, 9, 6, 40, 30, 31, 12, 18, 45, 16, 23, 14, 1, 21, 44, 35, 19, 2, 43], target=77

SOLUTION: []

PROBLEM: [7, 14, 38, 46, 3, 39, 19, 21, 27, 29, 24, 45, 30, 35, 22, 43, 23, 2, 13, 18], target=86

SOLUTION: []

PROBLEM: [42, 7, 8, 49, 34, 48, 36, 22, 21, 28, 23, 38, 47, 31, 27, 6, 4, 5, 1, 29], target=67

SOLUTION:
[36, 31]