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java202303java学习笔记第三十一天数据结构二叉树3遍历方式

（Java）数据结构之树与二叉树（二叉树的四种遍历，获取结点个数，获取叶子结点个数，获取高度，获取第k层结点个数，查找值为val的结点，判断一棵树是否为完全二叉树（详述，图文并茂）

1. 树形结构1.1 树的概念树是一种非线性的数据结构，它是由n个(n>=0)个有限节点组成一个具有层次关系的集合。它的形状像一颗倒挂的树，根在上，叶在下。特点：· 有一个特殊的结点称为根节点，根节点没有前驱结点· 除根节点外，其余结点被分成M(M>0)个互不相交的集合T1,T2,......

Java数据结构与算法——二叉树前中后序遍历 & 查找 & 删除

1.关于树结构为什么需要树这种数据结构？数组存储方式的分析优点：通过下标方式访问元素，速度快。对于有序数组，还可使用二分查找提高检索速度。缺点：如果要检索具体某个值，或者插入值(按一定顺序)会整体移动，效率较低。链式存储方式的分析优点：在一定程度上对数组存储方式有优化(比如&#x...

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🎄3. 给定一个二叉树，找到该树中两个指定节点的最近公共祖先题目：思路：祖先的定义：若节点 p 在节点 root 的左（右）子树中，或 p = root ，则称 root 是 p 的祖先。根据以上定义，若 root 是 p,q 的最近公共祖先 ...

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🗽非递归实现遍历二叉树（深入理解二叉树）代码每行都有注释，可以一步一步的画着图走一走，多走几遍，理解会上一个档次！前序遍历和中序遍历都用到栈，代码可以说一模一样，只不过打印节点的时机不一样⭐非递归前序遍历// 非递归实现前序遍历 public void FDG_...

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【Java数据结构】二叉树进阶——非递归实现前中后序遍历二叉树+进阶大厂面试题🗽非递归实现遍历二叉树（深入理解二叉树）⭐非递归前序遍历⭐非递归中序遍历⭐非递归后序遍历🗽大厂OJ面试题🎄1. 二叉树的构建及遍历🎄2. 二叉树的分层遍历🎄3. 给定一个二叉树，找到该树中两...

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