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LeetCode: Remove Nth Node From End of List [019]
【题目】 Given a linked list, remove the nth node from the end of list and return its head. For example, Given linked list: 1->2->3->4->5, and n = 2. After removing the second node from the end, the linked list becomes 1->2->3->5. Note: Given n will ...
分类:其他好文   时间:2014-05-18 18:48:03    阅读次数:269
LeetCode 016 3Sum Closest
【题目】 Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. For example, given array S = {...
分类:其他好文   时间:2014-05-18 10:37:57    阅读次数:269
LeetCode--Binary Tree Level Order Traversal
Binary Tree Level Order Traversal  Total Accepted: 12441 Total Submissions: 40879My Submissions Given a binary tree, return the level order traversal of its nodes' values. (ie, from left t...
分类:其他好文   时间:2014-05-18 10:11:13    阅读次数:337
LeetCode: Valid Parentheses [020]
【题目】 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are not. 【题意】 判断给定的字符串是否是合法的...
分类:其他好文   时间:2014-05-18 10:08:11    阅读次数:327
LeetCode 017 4Sum
【题目】 Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending ord...
分类:其他好文   时间:2014-05-18 08:46:04    阅读次数:227
[leetcode]:Two Sum
题目:给定一个数组,以及一个 target 值,target 表示目标和,要求在数组中找到两个数,xi,xj,使得 xi + xj = target。返回值是找到的两个数的下标索引,升序排序。假定至少存在一对解。 分析:对于要处理数组的问题,我们的理想状态都是给定的数组是有序的就好了,在有序后,我们就可以首位各放一个标记。类似于二分查找。 vector twoSum(vector &n...
分类:其他好文   时间:2014-05-18 08:04:03    阅读次数:234
LeetCode: Letter Combinations of a Phone Number [018]
【题目】 Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", "af", "bd", "be", "bf",...
分类:其他好文   时间:2014-05-18 07:30:12    阅读次数:340
apc smart UPS下使用apcupsd注意事项
公司的apc smart UPS安装有管理卡(似乎是AP-9631),服务器环境有FreeBSD、Windows Server、Linux(CentOS、Ubuntu) 实际使用中有如下问题需要注意: 1、一旦安装有管理卡,UPS上自带的串口是不能再使用的 2、因为是smart UPS,apcupsd在关闭服务器之后会调用重启ups指令,这就会有如下一些问题      a、如果apcups...
分类:其他好文   时间:2014-05-18 06:43:01    阅读次数:277
LeetCode--Symmetric Tree
对于本题,想到一个中序遍历后,判别是否为回文串的方法,却WA多次 class Solution { public: vector vectorValue; void inOrder(TreeNode* root) { if(root!=NULL) { inOrder(root->left);...
分类:其他好文   时间:2014-05-18 06:38:58    阅读次数:294
LeetCode 015 3Sum
【题目】 Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet (a,b,c) must be in non-descending order. (ie, a ≤ b ≤ c) The so...
分类:其他好文   时间:2014-05-18 03:15:50    阅读次数:287
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