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Unique Binary Search Trees
题目 Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 ...
分类:其他好文   时间:2014-06-08 17:06:58    阅读次数:235
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
LeetCode: Pascal's Triangle II [119]
【题目】 Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 【题意】 给定行索引k, k从0开始,返回该索引指向的杨辉三角的行 要求只能使用O(k)的额外空间 【思路】 ...
分类:其他好文   时间:2014-06-08 15:46:02    阅读次数:272
Unique Binary Search Trees II
题目 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. ...
分类:其他好文   时间:2014-06-08 15:15:26    阅读次数:223
[LeetCode] Palindrome Partitioning II [12]
题目:For example, given s = "aab", Return 1 since the palindrome partitioning ["aa","b"] could be produced using 1 cut 解题思路:给一个字符串,如果字符串可以划分成若干子回文字符串,返回最小的划分数量。 这个题如果还用之前求所有划分组合的循环加递归方法的话,就会得到超时的错误。这是就要考虑别的方法,动态规划倒是一个不错的方法,但是动态规划最重要的是要找到动态方程。本题的动态方程: dp[i] =...
分类:其他好文   时间:2014-06-08 14:56:58    阅读次数:257
Binary Tree Level Order Traversal II
题目 Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20...
分类:其他好文   时间:2014-06-08 09:23:34    阅读次数:230
HDU1002--A + B Problem II
HDU1002--A + B Problem II...
分类:其他好文   时间:2014-06-08 04:56:06    阅读次数:242
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 i...
分类:其他好文   时间:2014-06-08 00:33:42    阅读次数:339
ios项目中引用其他开源项目
1. 将开源项目的.xcodeproj拖入项目frameworks2. Build Phases下 Links Binary With Libraries 引入.a文件。Target Dependencies里引入开源项目文件3. Build Setting下的 Search Paths 里 Hea...
分类:移动开发   时间:2014-06-07 20:06:34    阅读次数:287
Xcode环境变量及路径设置
一般我们在xcode里面配置包含工程目录下头文件的时候,都要关联着相对路径和绝对路径,如果只是自己用这个项目,用绝对路径的问题不大,但是如果你把工程发给别人,别人就要在改这个绝对路径,这时候绝对路径的缺点立马出现。所以在修改User Header Search Paths这个选项的时候使用"$(SR...
分类:其他好文   时间:2014-06-07 17:01:15    阅读次数:220
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