发布时间：2015-09-26 15:20:24
//Validate Binary Search Tree My Submissions Question Solution <br />//Total Accepted: 63004 Total Submissions: 312589 Difficulty: Medium<br />//Given a binary tree, determine if it is a valid binary search tree (BST).<br />//<br />//Assume a BST is defined as follows:<br />//<br />//The .........【阅读全文】
发布时间：2015-09-26 15:19:31
//Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).<br />//<br />//For example, this binary tree is symmetric:<br />//<br />// 1<br />// / \<br />// 2 2<br />// / \ / \<br />//3 4 4 3<br />//But the fo.........【阅读全文】
发布时间：2015-09-26 15:19:05
<br /><br />import java.util.ArrayList;<br />import java.util.LinkedList;<br />import java.util.List;<br />import java.util.Queue;<br /><br /><br />public class BinaryTreeZigzagLevelOrderTraversal {<br /><br /><br />public static void main(String[] args) {<br />// TODO Auto-generated met.........【阅读全文】
发布时间：2015-09-26 15:18:39
//Unique Binary Search Trees II My Submissions Question Solution <br />//Total Accepted: 39624 Total Submissions: 139751 Difficulty: Medium<br />//Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.<br />//<br />//For example,<br />//Given n = 3, .........【阅读全文】
发布时间：2015-09-26 15:17:40
<br /><br />import java.util.ArrayList;<br />//Restore IP Addresses My Submissions Question Solution <br />//Total Accepted: 40984 Total Submissions: 191711 Difficulty: Medium<br />//Given a string containing only digits, restore it by returning all possible valid IP address combinations..........【阅读全文】
