instruction:
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
question:
[23, 31, 4, 40, 8, 2, 1, 19, 5, 26, 11, 9, 30, 12, 16, 35, 27, 29, 48, 25], target=18
answer:
[2, 16]


question:
[15, 1, 18, 48, 6, 31, 19, 22, 5, 16, 30, 43, 17, 46, 41, 32, 45, 40, 14, 26], target=47
answer:
[31, 16]


question:
[42, 14, 22, 40, 46, 17, 30, 23, 29, 37, 36, 9, 27, 15, 49, 11, 38, 35, 8, 45], target=43
answer:

[14, 29]