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最长公共上升子序列(LCIS)问题的O(n^2)解法
J - 病毒 Time Limit:3000MS     Memory Limit:131072KB     64bit IO Format:%lld & %llu Submit Status Practice CSU 1120 Appoint description:  System Crawler  (2015-01-04) Description ...
分类:其他好文   时间:2015-01-05 14:59:07    阅读次数:187
Best Time to Buy and Sell Stock III
Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most two transactions. Note: You may ...
分类:其他好文   时间:2015-01-04 17:14:20    阅读次数:130
Merge Sort
Good for array and linked list. Stable Sort.Time Complexity: Best, Average, Worst => O(nlogn);Space Complexity: O(n), in-place merge sort makes it ver...
分类:其他好文   时间:2015-01-04 13:25:46    阅读次数:156
O(n^2) Sortings
Insertion Sort:Time Complexity: Best O(n) (when already sorted); Average O(n^2); Worst O(n^2).Space Complexity: O(1) public static void main(String...
分类:其他好文   时间:2015-01-04 11:15:10    阅读次数:249
Java: Best Way to read a file
经常在各种平台的online test里面不熟悉STDIN, STOUT,下面举个例子:另外一个例子:从system.in读取一行作为输入String, 得到返回结果之后把它写入到指定位置的文件当中1 Scanner sc = new Scanner(new File("myNumbers")).....
分类:编程语言   时间:2015-01-04 08:38:03    阅读次数:185
Best Coder Round#25 1003 树的非递归访问
虽然官方解释是这题目里的树看作无向无环图,从答案来看还是在“以1作为根节点”这一前提下进行的,这棵树搭建好以后,从叶节点开始访问,一直推到根节点即可——很像动态规划的“自底向上”。但这棵树的搭建堪忧:给出的边不知道哪边更接近根节点。所以我给出的方案干脆在两个顶点都将对方加成孩子,等到访问的时候再作处...
分类:其他好文   时间:2015-01-03 23:50:30    阅读次数:233
Best Coder Round#25 1001 依赖检测
原题大致上就是检测一系列进程之间是否存在循环依赖的问题,形如: a->b->c->a, a->a ,都行成了循环依赖,事实上可以视为“检测链表中是否存在环”AC代码:#include #include #include using namespace std;int main(){ int p...
分类:其他好文   时间:2015-01-03 23:41:07    阅读次数:199
LeetCode: Best Time to Buy and Sell Stock II 解题报告
Best Time to Buy and Sell Stock IIQuestion SolutionSay you have an array for which the ith element is the price of a given stock on day i.Design an al...
分类:其他好文   时间:2015-01-03 19:45:09    阅读次数:140
LeetCode: Best Time to Buy and Sell Stock III 解题报告
Best Time to Buy and Sell Stock IIIQuestion SolutionSay you have an array for which the ith element is the price of a given stock on day i.Design an a...
分类:其他好文   时间:2015-01-03 19:43:30    阅读次数:171
LeetCode: Best Time to Buy and Sell Stock 解题报告
Best Time to Buy and Sell StockSay you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to compl...
分类:其他好文   时间:2015-01-03 19:43:30    阅读次数:205
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