This problem deals with finding a route between two nodes in a directed graph. An example input is given, and the expected output is "There is a route between A and D."

A.I. Evaluation of the Solution

The candidate's solution is correct and uses a breadth-first search to find the shortest path between two nodes. The time complexity is O(n) and the space complexity is O(n).

Evaluated at: 2022-11-18 00:16:05