LCA精品文章

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  leetcode235-236 lowest common ancestor

  ...要求 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 bet...

  chadLi 2019-08-15 13:37 評(píng)論0 收藏0
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  LCA---Lowest common ancestor

  在root為根的二叉樹(shù)中找A,B的LCA: 如果找到了就返回這個(gè)LCA 如果只碰到A，就返回A 如果只碰到B，就返回B 如果都沒(méi)有，就返回null /** * Definition of TreeNode: * public class TreeNode { * public int val; * public TreeNode left, right; * pu...

  cooxer 2019-08-14 17:08 評(píng)論0 收藏0
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  [Leetcode] Lowest Common Ancestor of a Binary Tree

  ...2/... 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...

  Dr_Noooo 2019-08-14 12:25 評(píng)論0 收藏0
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  [LintCode/LeetCode] Lowest Common Ancestor of BST/

  ...n the root and two nodes in a Binary Tree. Find the lowest common ancestor(LCA) of the two nodes. The lowest common ancestor is the node with largest depth which is the ancestor of both nodes. Exam...

  dinfer 2019-08-14 15:33 評(píng)論0 收藏0
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  [Leetcode] Binary Tree Paths 二叉樹(shù)路徑

  ...徑一定會(huì)經(jīng)過(guò)兩個(gè)節(jié)點(diǎn)的最小公共祖先，所以我們可以用LCA的解法。不同于LCA的是，我們返回不只是標(biāo)記，而要返回從目標(biāo)結(jié)點(diǎn)遞歸回當(dāng)前節(jié)點(diǎn)的路徑。當(dāng)遇到最小公共祖先的時(shí)候便合并路徑。需要注意的是，我們要單獨(dú)處理目...

  Vicky 2019-08-14 16:10 評(píng)論0 收藏0