https://pintia.cn/problem-sets/994805342720868352/problems/994805343727501312 The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined…

题目:https://pintia.cn/problem-sets/994805342720868352/problems/994805343727501312 题意: 给定一个二叉搜索树,以及他的前序遍历序列. 现在有m组询问,对于给定的两个关键字值u,v问他们的最近公共祖先是谁. 思路: 根本跟LCA都没关系好吗.m不是很大,每组询问都查找一次u和v就行了. 因为是BST所以根据前序序列可以直接建出这棵树. 然后在树上查找u和v. 本来还用了一个vector分别存根到u,v的路径,然后两个循…

题目 The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following properties: The lef subtree of a n…

1143 Lowest Common Ancestor(30 分) The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following pro…

1143 Lowest Common Ancestor(30 分)The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following prop…

The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a nod…

The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a nod…

The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a nod…

1145 Hashing - Average Search Time(25 分)The task of this problem is simple: insert a sequence of distinct positive integers into a hash table first. Then try to find another sequence of integer keys from the table and output the average search time (…

Given a binary search tree(BST), find the lowest common ancestor of two given nodes in the BST. Node* LCA(Node* root, Node* p, Node* q) { if (!root || !p || !q) return NULL; if (max(p->data, q->data) < root->data) return LCA(root->left, p,…