Graph theory - the shortest path

 

Dijstra:   https://www.jianshu.com/p/ff6db00ad866

 

BFS: https://github.com/CyC2018/CS-Notes/blob/master/notes/Leetcode%20%E9%A2%98%E8%A7%A3%20-%20%E6%90%9C%E7%B4%A2.md#1-%E8%AE%A1%E7%AE%97%E5%9C%A8%E7%BD%91%E6%A0%BC%E4%B8%AD%E4%BB%8E%E5%8E%9F%E7%82%B9%E5%88%B0%E7%89%B9%E5%AE%9A%E7%82%B9%E7%9A%84%E6%9C%80%E7%9F%AD%E8%B7%AF%E5%BE%84%E9%95%BF%E5%BA%A6