Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus sum of all keys greater than the original key in BST. Example: Input: The root of a Binary Search Tree like thi…
建一个二叉搜索树,然后前序输出. 用链表建的,发现很久没做都快忘了... #include <cstdio> #include <cstdlib> struct Node{ int v; Node* l; Node* r; }; Node* root; Node* newnd(int value) { Node* u = (Node*) malloc(sizeof(Node)); if (u != NULL) { u -> v = value; u -> r = u -…
[抄题]: 给定二叉搜索树(BST),将其转换为更大的树,使原始BST上每个节点的值都更改为在原始树中大于等于该节点值的节点值之和(包括该节点). Given a binary search Tree `{5,2,13}`: 5 / \ 2 13 Return the root of new tree 18 / \ 20 13 [暴力解法]: 时间分析: 空间分析: [思维问题]: [一句话思路]: 反向求和并把和赋给root.val [输入量]:空: 正常情况:特大:特小:程序里处理到的特殊情…