This problem is about determining if a given string has all unique characters. An example input would be "abcdefg" and the corresponding output would be "True".

A.I. Evaluation of the Solution

The candidate's solution is correct and uses a HashSet, which is an efficient data structure for this problem. The solution is also O(n), which is the best possible time complexity for this problem.

Evaluated at: 2022-11-29 08:15:32