Given therootof a binary tree and an array ofTreeNodeobjectsnodes, returnthe lowest common ancestor (LCA) ofall the nodesinnodes. All the nodes will exist in the tree, and all values of the tree's nodes areunique. Extending thedefinition of LCA on Wikipedia: "The lowest common ancestor ...
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to thedefinition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q as descendants (wh...
LeetCode 235. Lowest Common Ancestor of a Binary Search Tree 因为是二叉搜索树,所以可以根据值的大小判定是属于根节点的左子树还是右子树。 如果都是在左子树部分,那么最低公共祖先一定属于当前节点的左子树; 如果都是在右子树部分,那么最低公共祖先一定属于当前节点的右子树; 否则当前节点一定是最低公共祖先(为...
The node of a binary tree is aleafif and only if it has no children Thedepthof the root of the tree is 0, and if the depth of a node isd, the depth of each of its children isd+1. Thelowest common ancestorof a setSof nodes is the nodeAwith the largest depth such that every ...