linking_lin的博客

#include <stdio.h> #include <string.h> #include <assert.h> #include <malloc.h> #define maxlen 30 typedef struct Node { struct Node * leftChild; struct Node * rightCh...

Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key. The ...