#Ancestor

ORA-44413: Invalid ACL: Security class of parent ACL must be an ancestor of security class of child ACL

文档解释ORA-44413:InvalidACL:SecurityclassofparentACLmustbeanancestorofsecurityclassofchildACLCause:SecurityclassofparentACLwasnotanancestorofsecurityclassofchildAC...

235. Lowest Common Ancestor of a Binary Search Tree

Givenabinarysearchtree(BST),findthelowestcommonancestor(LCA)oftwogivennodesintheBST.AccordingtothedefinitionofLCAonWikipedia:“Thelowestcommonancestorisdef...

leetcode 235. Lowest Common Ancestor of a Binary Search Tree 236. Lowest Common Ancestor of a Binary Tree

https://www.cnblogs.com/grandyang/p/4641968.htmlhttp://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...

HDU6031 Innumerable Ancestors 倍增

去博客园看该题解题目查看原题-HDU6031 InnumerableAncestors  有一棵有n个节点的有根树,根节点为1,其深度为1,现在有m个询问,每次询问给出两个集合A和B,问LCA(x,y)(x∈A,y∈B)的深度最大为多少。  有多组数据(数据组数<=5)  对于每一组...

POJ1330Nearest Common Ancestors

去博客园看该题解题意第一行输入T,有T组数据。对于每组数据,给出一棵树,先输入n,然后n-1行,每行两个数a,b,表示a是b的父亲;第n行输入两个数A,B表示询问A和B的最近公共祖先。题解LCA模板题。参见LCA学习笔记LCA倍增算法&POJ1330标程 #include<cstring>...

poj 1330 Nearest Common Ancestors (LCA)

NearestCommonAncestorsTimeLimit:1000MS MemoryLimit:10000KTotalSubmissions:34208 Accepted:17372DescriptionArootedtreeisawell-knowndatastructureincomput...