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3 Sum leetcode java
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...
分类:编程语言   时间:2014-07-22 22:47:16    阅读次数:252
MySQL执行计划显示与执行过程不符合一例
一 建表和现象的过程如下CREATE TABLE t1 (id1 INT, a1 INT, b1 INT, PRIMARY KEY(id1));CREATE TABLE t3 (id3 INT UNIQUE, a3 INT, b3 INT);INSERT INTO t1 VALUES (1, 1, ...
分类:数据库   时间:2014-07-22 22:45:34    阅读次数:308
【leetcode刷题笔记】Unique Binary Search Trees II
Givenn, generate all structurally uniqueBST's(binary search trees) that store values 1...n.For example,Givenn= 3, your program should return all 5 uni...
分类:其他好文   时间:2014-07-22 22:42:33    阅读次数:243
4 Sum leetcode java
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 w...
分类:编程语言   时间:2014-07-22 22:41:14    阅读次数:396
LeetCode "Unique Paths"
Now I believe thoughts leading to DP is brutal DFS.. DFS is brutal force enumeration, but that's too much and naive. We need pruning. So, DFS + Prunin...
分类:其他好文   时间:2014-07-22 22:40:34    阅读次数:183
【leetcode刷题笔记】Unique Paths II
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i...
分类:其他好文   时间:2014-07-22 00:28:36    阅读次数:169
The use of laser machines and systems in the modern world has increased to a great level
The use of laser machines and systems in the modern world has increased to a great level. This is because of the unique end results that the user achi...
分类:其他好文   时间:2014-07-22 00:15:34    阅读次数:224
动态规划第五讲——leetcode上的题目动态规划汇总(上)
本节,我们将对leetcode上有关DP问题的题目做一个汇总和分析。 1.题目来源 Interleaving String 动态规划 二叉树 Unique Binary Search Trees 动态规划 二叉树 Word Break 动态规划 N/A Word Break II 动态规划 N/A Palindrome Partitioning 动态规划 N/A ...
分类:其他好文   时间:2014-07-21 15:47:05    阅读次数:232
动态规划第五讲——leetcode上的题目动态规划汇总(上)
本节,我们将对leetcode上有关DP问题的题目做一个汇总和分析。 1.题目来源 Interleaving String 动态规划 二叉树 Unique Binary Search Trees 动态规划 二叉树 Word Break 动态规划 N/A Word Break II 动态规划 N/A Palindrome Partitioning 动态规划 N/A ...
分类:其他好文   时间:2014-07-21 15:21:05    阅读次数:189
unique 验证 criteria 使用
modelarray('code', 'unique', 'criteria' =>array('condition' =>'schoolid=:schoolid','params' => array(':schoolid'=> $this->schoolid)))Controller$model-...
分类:其他好文   时间:2014-07-21 14:21:01    阅读次数:229
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