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原题链接题意：给定序列表示dfs一棵树遍历得到的顺序，每次经过一个节点都输出该节点对应的字母，求有多少棵树满足此序列。思路：首先根据dfs的过程可以得到如果一棵树有n个节点的话，他的序列长度为2n-1；所以如果给出的长度为m的话，节点数量n=(m+1)/2。所以如果说给出的序列长度是...

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欢迎回到：遇见蓝桥遇见你，不负代码不负卿！目录一、引入：深度优先搜索（DFS）二、经典例题例题1.二叉搜索树的范围和题目描述题解代码执行例题2.岛屿数量题目描述题解代码执行例题3.背包问题题目描述题解代码执行三、思考题四、蓝桥结语：遇见蓝桥遇见你，不负代码不负卿！前...

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