LizzHale/Interview-Practice — pull request #1 by LizzHale (2014-05-14 03:53:20+00:00)
Title: O(n) solution

The function sum_of_two returns a list of the unique pairs of integers in the list that sum to the target.

Christian complicated the problem and asked for a function that returns a list of unique triplets that sum to the target. The function sum_three comes close but still returns duplicates.