Full article and Easy read on LeetCode [Hard] Bus Routes | Algorithm — BFS — Hung, Chien-Hsiang | Blog (chienhsiang-hung.github.io). Question Bus Routes — LeetCode Attempts Classic DFS At first, I came oup with a classic DFS solution. class Solution:
def numBusesToDestination(self, routes: List[List[int]], source: int, target: int) -> int…