https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/ 中文版描述 给定一个二叉搜索树, 找到该树中两个指定节点的最近公共祖先。百度百科中最近公共祖先的定义为:“对于有根树 T 的两个结点 p、q,最近公共...
https://github.com/grandyang/leetcode/issues/236 类似题目: Lowest Common Ancestor of a Binary Search Tree 参考资料: https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/discuss/65225/4-lines-C++JavaPython...
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to thedefinition 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 as descendants (where we allow ...
Can you solve this real interview question? Lowest Common Ancestor of a Binary Tree - 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 [https://en.wikipedia.org/wi
LeetCode Top 100 Liked Questions 236. Lowest Common Ancestor of a Binary Tree (Java版; Medium) 题目描述 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 betw...
According to thedefinition 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 as descendants (where we allowa node to be a descendant of itself).” ...
return lowestCommonAncestor(root->left,p,q); } else if(pVal > rootVal && qVal > rootVal) { return lowestCommonAncestor(root->right,p,q); } return root; } }; 2016-08-07 09:47:25 分享题目:leetCode235.LowestCommonAncestorofaBinarySearchTree二排序树问题 ...
对于lowestCommonAncestor这个函数的理解的话,它不一定可以返回最近的共同祖先,如果子树中只能找到p节点或者q节点,它最终返回其实就是p节点或者q节点。这其实对应于最后一种情况,也就是leftCommonAncestor和rightCommonAncestor都不为null,说明p节点和q节点分处于两个子树中,直接return root。
LCA (Lowest Common Ancestor) 中文名称"最近公共祖先"。是指在树中,两个节点的最近的公共根。LeetCode里面的236题讲的就是这个。 实现 方法1:recursion publicTreeNodelca(TreeNode root,TreeNode p,TreeNode q){if(root==null||p==null||q==null){returnnull;}if(root==p||root==q){// 因为root是...
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/description/ 解题思路: 首先得到p和q的最大值和最小值,然后判断是否最大值小于root.val和最小值大于root.val 代码: class Solution { public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) { ...