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HDU 1506 Largest Rectangle in a Histogram(DP)
可以发现 当第i-1个比第i个高的时候 比第i-1个高的所有也一定比第i个高 于是可以用到动态规划的思想 令left[i]表示包括i在内比i高的连续序列中最左边一个的编号 right[i]为最右边一个的编号 那么有 当h[left[i]-1]>=h[i]]时 left[i]=left[left[i]-1] 从前往后可以递推出left[i] 同理 当h[right[i]+1]>=h[i]]时 right[i]=right[right[i]+1] 从后往前可递推...
分类:其他好文   时间:2014-08-05 09:39:49    阅读次数:276
KD Tree
最近在项目中用到了,特地搬运过来。Kd-树 其实是K-dimension tree的缩写,是对数据点在k维空间中划分的一种数据结构。其实,Kd-树是一种平衡二叉树。举一示例:假设有六个二维数据点 = {(2,3),(5,4),(9,6),(4,7),(8,1),(7,2)},数据点位于二维空间中。为...
分类:其他好文   时间:2014-08-05 09:30:38    阅读次数:321
Binary Tree Level Order Traversal leetcode java
题目:Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level).For example:Given binary tree....
分类:编程语言   时间:2014-08-05 05:18:28    阅读次数:242
Binary Tree Level Order Traversal II leetcode java
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).F....
分类:编程语言   时间:2014-08-05 05:18:08    阅读次数:340
Binary Tree ZigZag Level Order Traversal leetcode java
题目:Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level ....
分类:编程语言   时间:2014-08-05 05:17:38    阅读次数:311
Recover Binary Search Tree leetcode java
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....
分类:编程语言   时间:2014-08-05 05:17:28    阅读次数:265
纠结中的tree
都是自己在实践过程中遇到的,首先是自己安装apache-maven进行简单的认识学习的时候想看看my-app项目的tree结果发现bash:treecommandnotfound解决这个问题,在查阅资料后发现,前提是我是centos6.5的最小化安装在家目录下打开文件.bash_profile后发现PATH=$PATH:$HOME/bin将其..
分类:其他好文   时间:2014-08-05 03:15:28    阅读次数:245
LeetCode "Recover Binary Search Tree"
An example of in-order traversal application. My intuition is that, we have to serialize it into an array and check, but in-order traversal does exact...
分类:其他好文   时间:2014-08-05 03:03:48    阅读次数:241
LeetCode——Populating Next Right Pointers in Each Node II
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 ...
分类:其他好文   时间:2014-08-05 00:51:38    阅读次数:249
POJ 2486 Apple Tree
Apple Tree Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7120   Accepted: 2370 Description Wshxzt is a lovely girl. She likes apple very much. One day HX tak...
分类:移动开发   时间:2014-08-05 00:50:38    阅读次数:310
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