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[leetcode]Unique Paths @ Python
原题地址:https://oj.leetcode.com/problems/unique-paths/题意:A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The ...
分类:编程语言   时间:2014-06-15 23:37:55    阅读次数:311
[leetcode]Unique Paths II @ Python
原题地址:https://oj.leetcode.com/problems/unique-paths-ii/题意:Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many ...
分类:编程语言   时间:2014-06-15 23:33:26    阅读次数:353
[leetcode]Permutation Sequence @ Python
原题地址:https://oj.leetcode.com/submissions/detail/5341904/题意:The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of ...
分类:编程语言   时间:2014-06-15 21:33:16    阅读次数:270
Combination Sum
题目 Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C un...
分类:其他好文   时间:2014-06-15 20:00:18    阅读次数:185
索引的五种访问模式
1 index unique scan 效率最高,主键或唯一索引2 index fast full scan 读的最快,可以并行访问索引,但输出不按顺序3 index full scan 有顺序的输出,不能并行读索引。4 index range scan 在给定的区间查询5 index s...
分类:其他好文   时间:2014-06-15 19:41:17    阅读次数:169
Combination Sum II
题目 Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. Each number in C may only be used once in...
分类:其他好文   时间:2014-06-15 19:24:21    阅读次数:229
leetcode -day28 Unique Binary Search Trees I II
1、 ?? Unique Binary Search Trees II 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 uni...
分类:其他好文   时间:2014-06-15 09:09:00    阅读次数:256
Mysql技术内幕——表&索引算法和锁
表4.1、innodb存储引擎表类型innodb表类似oracle的IOT表(索引聚集表-indexorganized table),在innodb表中每张表都会有一个主键,如果在创建表时没有显示的定义主键则innodb如按照如下方式选择或者创建主键。首先表中是否有唯一非空索引(unique not...
分类:数据库   时间:2014-06-15 00:05:51    阅读次数:444
[LeetCode]3Sum,解题报告
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) ...
分类:其他好文   时间:2014-06-14 12:45:13    阅读次数:209
【Leetcode】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 is marked as 1 and 0 respectively in the...
分类:其他好文   时间:2014-06-14 12:02:12    阅读次数:229
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