Two Sum
Given an array of integers nums and an integer target, return the indices of the two numbers such that they add up to target.
You may assume that each input has exactly one solution, and you may not use the same element twice.
Return the answer in any order.
Example 1
Input
nums = [2,7,11,15], target = 9Output
[0,1]The values at indices 0 and 1 are 2 and 7, which add up to 9.
Example 2
Input
nums = [3,2,4], target = 6Output
[1,2]The values at indices 1 and 2 are 2 and 4, which add up to 6.
Constraints
- 2 <= nums.length <= 10^4
- -10^9 <= nums[i] <= 10^9
- -10^9 <= target <= 10^9
- Only one valid answer exists.