Given `nums` and `target`, return indices of two distinct numbers that add up to `target`. Exactly one solution exists. Variant **#24**.
Example 1
Input: nums = [24,23,6,17,28,39,10,20], target = 43
Output: [1,7]
nums[1] + nums[7] = 43
Constraints
Acceptance: 55% · Topics: array, hash-table