广度优先搜索(BFS) 的伪代码——应用队列 参考 https://leetcode-cn.com/explore/learn/card/queue-stack/217/queue-and-bfs/870/ /** * Return the length of the shortest path between root and target node. */ int BFS(Node root, Node target) { Queue<Node> queue; // store all nodes which are waiting to be processed...