Subject description:
Given an integer array nums and a target value target, and ask you to identify the target value of the two integers in the array, and return to their array subscript. You can assume that each input corresponds to only one answer. However, you can not re-use the same array element.
Code analysis:
https://cyberbug.site/2019/07/21/LeetCode-1.%E4%B8%A4%E6%95%B0%E4%B9%8B%E5%92%8C.html