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:
[30, 4, 39, 18, 25, 36, 43, 22, 13, 23, 8, 19, 49, 3, 27, 35, 28, 1, 20, 37], target=27
answer:
[4, 23]


question:
[43, 48, 13, 35, 22, 3, 24, 23, 47, 2, 33, 29, 30, 44, 34, 14, 5, 12, 40, 19], target=33
answer:
[3, 30]


question:
[47, 6, 11, 42, 37, 18, 29, 19, 25, 4, 10, 44, 23, 9, 5, 21, 30, 31, 1, 49], target=100
answer:

[]


