Given `nums` and `target`, return indices of two distinct numbers that add up to `target`. Exactly one solution exists. Variant **#57**.
Example 1
Input: nums = [17,22,39,10,21,32,3,14,25,36,7,18,29,0,11,22,33,4,15,26,1], target = 23
Output: [1,20]
nums[1] + nums[20] = 23
Constraints
Acceptance: 54% · Topics: array, hash-table