Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has…

leetcode面试准备:Lowest Common Ancestor of a Binary Search Tree & Binary Tree 1 题目 Binary Search Tree的LCA Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikiped…

235. Lowest Common Ancestor of a Binary Search Tree Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between…

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has both v and w…

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has…

解法一:递归 TreeNode* lowestCommonAncestor(TreeNode* root, TreeNode* p, TreeNode* q) { if (root == NULL || p == NULL || q == NULL) return NULL; if (root->val > p->val && root->val > q->val) return lowestCommonAncestor(root->left, p…

这是悦乐书的第197次更新,第203篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第59题(顺位题号是235).给定二叉搜索树(BST),找到BST中两个给定节点的最低共同祖先(LCA).根据维基百科上LCA的定义:"最低共同祖先在两个节点p和q之间定义为T中的最低节点,其中p和q都是后代(我们允许节点成为其自身的后代)." 给定二叉搜索树:root = [6,2,8,0,4,7,9,null,null,3,5] 6 / \ 2 8 / \ / \ 0 4…

Lowest Common Ancestor of a Binary Search Tree Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two…

https://www.cnblogs.com/grandyang/p/4641968.html http://www.cnblogs.com/grandyang/p/4640572.html 利用二叉搜索树的性质:左子树所有节点小于根节点,右子树所有节点大于根节点 如果两个节点的最大值小于根节点,那最低公共祖先一定在左子树,去左子树找: 如果两个节点的最小值大于根节点,那最低公共祖先一定在右子树,去右子树找: 其他情况下,当前节点一定就是最低公共祖先.其中,其他情况包括两种,即p是q或者q是p…

235. Lowest Common Ancestor of a Binary Search Tree Easy Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined be…