Given `nums` and `target`, return indices of two distinct numbers that add up to `target`. Exactly one solution exists. Variant **#67**.
Example 1
Input: nums = [27,2,9,20,31,2,13,24,35,6,21], target = 23
Output: [1,10]
nums[1] + nums[10] = 23
Constraints
Acceptance: 78% · Topics: array, hash-table