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LeetCode:Generate Parentheses
题目链接Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((...
分类:其他好文   时间:2014-06-09 15:11:33    阅读次数:212
[leetcode] 22.Same Tree
同是递归简单题public class Solution { public boolean isSameTree(TreeNode p, TreeNode q) { boolean flag = true; if(p == null && q == null) ...
分类:其他好文   时间:2014-06-09 13:46:23    阅读次数:275
centos下yum安装mysql5.6后,无法启动 MySQL Daemon failed to start
如果是全新安装应该就不会出现这个问题,升级安装的话,要运行mysql_upgrade ,但是启动MYSQL就报错MySQL Daemon failed to start如此就没办法运行mysql_upgrade升级MYSQL表了因为是全新安装的数据库服务器就不管老数据了,直接把老的MYSQL数据库文...
分类:数据库   时间:2014-06-08 21:41:49    阅读次数:420
[LeetCode] Largest Rectangle in Histogram
第一种方法,暴力求解,从当前向左右两个方向扫描比自己小的,然后计算面积,时间复杂度O(n^2)code如下,但是在LeetCode上回超时。 1 class Solution { 2 public: 3 int largestRectangleArea(vector &height) { 4...
分类:其他好文   时间:2014-06-08 21:24:07    阅读次数:328
LeetCode: Populating Next Right Pointers in Each Node II [117]
【题目】 Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example, Given the following binary tre...
分类:其他好文   时间:2014-06-08 15:46:22    阅读次数:303
Recover Binary Search Tree
题目 Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Cou...
分类:其他好文   时间:2014-06-08 15:32:45    阅读次数:245
【oracle案例】ORA-01722
Oralce升级过程中,执行SQL> @?/rdbms/admin/catupgrd.sql脚本时, 遇到ORA-01722: invalid number报错, 导致报错的语句是 SELECT TO_NUMBER('DATA_VAULT_OPTION_ON') FROM v$option。 解决方法: 关闭Oracle Database Vault功能。...
分类:数据库   时间:2014-06-08 09:08:07    阅读次数:251
Subsets II
题目 Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not c...
分类:其他好文   时间:2014-06-08 05:32:21    阅读次数:196
Subsets
题目 Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets. ...
分类:其他好文   时间:2014-06-08 04:01:05    阅读次数:240
Leetcode: Wildcard Matching. java
Implement wildcard pattern matching with support for '?' and '*'.public class Solution { public boolean isMatch(String s, String p) { if (s == null || p == null) return false; if (...
分类:编程语言   时间:2014-06-08 03:10:46    阅读次数:216
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