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Leetcode | Insert Interval
Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals were initial...
分类:其他好文   时间:2014-05-09 16:29:17    阅读次数:330
Leetcode: Path Sum
1 /** 2 * Definition for binary tree 3 * public class TreeNode { 4 * int val; 5 * TreeNode left; 6 * TreeNode right; 7 * TreeNo...
分类:其他好文   时间:2014-05-09 12:16:45    阅读次数:232
LeetCode之Single Number以及拓展
Problem 1:一个数组中有一个数字a只出现一次,其他数字都出现了两次。请找出这个只出现一次的数字?考察知识点:异或运算思路:比如数字 b^b = 0 a^0 = a因此,可以将数组中的所有数字进行异或,而最终异或的结果即为所求只出现一次的数字a.代码:1 def SingleNu...
分类:其他好文   时间:2014-05-09 12:14:22    阅读次数:475
LeetCode: Triangle 题解
Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given the fol...
分类:其他好文   时间:2014-05-08 21:08:25    阅读次数:407
Leetcode | Sort Colors
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, ...
分类:其他好文   时间:2014-05-07 18:01:05    阅读次数:412
[leetcode] Path sum路径之和
要求给定树,与路径和,判断是否存在从跟到叶子之和为给定值的路径。比如下图中,给定路径之和为22,存在路径,因此返回true;否则返回false. 5 / \ 4 8 / / \ 11...
分类:其他好文   时间:2014-05-07 10:15:46    阅读次数:270
Leetcode | Binary Tree Maximum Path Sum
Given a binary tree, find the maximum path sum.The path may start and end at any node in the tree.For example:Given the below binary tree, 1 ...
分类:其他好文   时间:2014-05-07 09:36:09    阅读次数:300
LeetCode OJ - Validate Binary Search Tree
验证二叉树是否是查找树,可以通过查看它的中序遍历是否是升序的。下面是AC代码: 1 /** 2 * Given a binary tree, determine if it is a valid binary search tree (BST). 3 * solution : 4...
分类:其他好文   时间:2014-05-07 09:01:45    阅读次数:250
LeetCode::Trapping Rain Water
1、到今天完成39题,还需要不停的加油。今天再分析下装雨水这道题Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water i...
分类:移动开发   时间:2014-05-06 14:08:48    阅读次数:490
LeetCode OJ - Recover Binary Search Tree
这道题要求空间复杂度为O(1),则只能采用Morris Traversal进行中序遍历!!这个了解了之后,难点在于如何定位到两个被交换了的节点?我就被困在这里几个小时!!!(允许我为自己的愚蠢表示下悲伤吧!!!)参考了discuss中前辈的算法,才发现很简单!!!我们只需要这样来看问题,BST的中序...
分类:其他好文   时间:2014-05-06 12:55:19    阅读次数:301
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