Given `nums` and `target`, return indices of two distinct numbers that add up to `target`. Exactly one solution exists. Variant **#37**.
Example 1
Input: nums = [37,12,19,30,1,12,23,34,5,16,27,38,9,20,31,2,13,24,35,6,11], target = 23
Output: [1,20]
nums[1] + nums[20] = 23
Constraints
Acceptance: 65% · Topics: array, hash-table