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【leetcode】Unique Paths
Unique PathsA robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right a...
分类:其他好文   时间:2015-01-05 00:19:55    阅读次数:231
leetcode 4Sum
Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
分类:其他好文   时间:2015-01-04 22:38:14    阅读次数:294
uva 227 Puzzle
PuzzleA children's puzzle that was popular 30 years ago consisted of a 5x5 frame which contained 24 small squares of equal size. A unique letter of th...
分类:其他好文   时间:2015-01-04 15:07:09    阅读次数:157
[LeetCode]62 Unique Paths
https://oj.leetcode.com/problems/unique-paths/http://blog.csdn.net/linhuanmars/article/details/22126357publicclassSolution{ publicintuniquePaths(intm,intn){ if(m<0||n<0) return-1;//Invalidinput //Start0,0 //Endm,n //Useamatrix[m][n]. //Eachelementi..
分类:其他好文   时间:2015-01-04 11:36:10    阅读次数:101
[LeetCode]63 Unique Paths II
https://oj.leetcode.com/problems/unique-paths-ii/http://blog.csdn.net/linhuanmars/article/details/22135231publicclassSolution{ publicintuniquePathsWithObstacles(int[][]obstacleGrid){ //Validations if(obstacleGrid==null||obstacleGrid.length==0||obstacleGrid..
分类:其他好文   时间:2015-01-04 11:34:38    阅读次数:116
[leetcode] Unique Binary Search Trees
题目:(DP)Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST...
分类:其他好文   时间:2015-01-02 06:24:14    阅读次数:195
BZOJ1486 [HNOI2009]最小圈
今年的最后一篇了呢。。。好伤感的说,2014年还有1h就过去了不不不回到正题,这道题嘛~看上去好神啊!看到此题,我们可以联想到最优比例MST,于是就有了方法:首先二分答案ans,判断ans是否可行,那如何判断呢?每条边边权 - ans,之后在新的图中找负环即可。(可以用dfs版的spfa) 1 /....
分类:其他好文   时间:2014-12-31 23:58:29    阅读次数:447
oracle 创建索引
适当的使用索引可以提高数据检索速度,可以给经常需要进行查询的字段创建索引。 oracle的索引分为5种:唯一索引,组合索引,反向键索引,位图索引,基于函数的索引 创建Oracle索引的标准语法: CREATE INDEX 索引名 ON 表名 (列名) TABLESPACE 表空间名; 创建唯一索引: CREATE unique INDEX 索引名 ON 表名 (列名) T...
分类:数据库   时间:2014-12-31 10:04:34    阅读次数:238
LeetCode:Unique Binary Search Trees II
题目描述: Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example, Given n = 3, your program should return all 5 unique BST's shown below. 1...
分类:其他好文   时间:2014-12-30 11:49:09    阅读次数:144
LintCode-Unique Path 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:2014-12-30 08:09:14    阅读次数:161
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