Given `nums` and `target`, return indices of two distinct numbers that add up to `target`. Exactly one solution exists. Variant **#5**.
Example 1
Input: nums = [5,16,27,38,9,20,31,2,37], target = 53
Output: [1,8]
nums[1] + nums[8] = 53
Constraints
Acceptance: 67% · Topics: array, hash-table