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Palindrome Partitioning II
题目 Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning of s. For example, given s = "a...
分类:其他好文   时间:2014-06-20 13:44:18    阅读次数:234
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: Best Time to Buy and Sell Stock [121]
【题目】 Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm to find the maximum profit. ...
分类:其他好文   时间:2014-06-08 15:11:58    阅读次数:298
[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
tomcat启动报错,找不到对应的 queue,从而引发内存泄漏
tomcat启动报错,无法创建 bean listenerStatusChangeDealHandler, no queue 'STOCK.NOTIFY_CHANGE.INTER.CACHE.QUEUE' in vhost 从启动日志来看,有时候仅会看到内存泄漏,而没有与queue相关的日志,很容易走错方向。 按照 http://blog.csdn.net/wangjunjun2008/a...
分类:其他好文   时间:2014-06-08 10:54:17    阅读次数:924
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
[LeetCode] Longest Palindromic Substring [14]
最长回文字串,相信做过Palindrome Partitioning II 这个题的同学应该可以很快做出来。没错,这个题还可以使用动态规划方法得到一个时间复杂度为O(n^2)的解法,当然如果你想要更好的时间复杂度的算法也是有的。好的,我们先来看看时间复杂度为O(n^2)的算法。 代码实现--动态规划O(n^2) 相信如果你在网上看过了别人的算法,你会发现我的算法是最简洁的。哈哈,这个题需要注意的是如果你用惯了vector的话,你这里肯定会得到超时的提示... ...代码二--复杂度为O(n)的算法...
分类:其他好文   时间:2014-06-07 12:08:43    阅读次数:224
Pascal's Triangle II
Pascal's Triangle II, leetcode,两个解法...
分类:其他好文   时间:2014-06-07 11:56:29    阅读次数:138
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