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Reserved space protection
Reserved space (invalid address) is protected against abnormal access. Reads from invalid address return garbage; writes to invalid address are blocked. Access to reserved space can generate exception...
分类:其他好文   时间:2014-06-20 11:58:31    阅读次数:260
[cc150] Find all valid combinations of n-pairs of parentheses
Implement an algorithm to print all valid ( properly opened and closed) combinations of n-pairs of parentheses.思路:比如 n = 3, ((())) 就是一个valid combinati...
分类:其他好文   时间:2014-06-11 13:19:00    阅读次数:306
leetcode--Generate Parentheses
Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((()))...
分类:其他好文   时间:2014-06-11 12:25:51    阅读次数:239
[LeetCode] Longest Valid Parentheses
第一种方法,用栈实现,最容易想到,也比较容易实现,每次碰到‘)’时update max_len,由于要保存之前的‘(’的index,所以spacecomplexity 是O(n) 1 // 使用栈,时间复杂度 O(n),空间复杂度 O(n) 2 class Solution { 3 publ...
分类:其他好文   时间:2014-06-11 09:16:10    阅读次数:197
LeetCode:Generate Parentheses
题目链接Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((...
分类:其他好文   时间:2014-06-09 15:11:33    阅读次数:212
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: Pascal's Triangle [118]
【题目】 Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] 【题意】 给定整数numRows, 要求生成杨辉三角的前numRows行 【思路】 杨辉三角有以下特点: 1. 第n行有n个元素 ...
分类:其他好文   时间:2014-06-08 09:17:06    阅读次数:196
Algorithm | Random
随机生成[0,n)中不重复的m个数。 1 class Random { 2 public: 3 Random(int n, int m):n(n), m(m) {} 4 void generate() { 5 srand(time(NULL)); 6 ...
分类:其他好文   时间:2014-06-07 08:42:38    阅读次数:178
projecteuler---->problem=14----Longest Collatz sequence
title: The following iterative sequence is defined for the set of positive integers: n n/2 (n is even) n 3n + 1 (n is odd) Using the rule above and starting with 13, we generate the followi...
分类:其他好文   时间:2014-06-04 13:56:33    阅读次数:254
每日算法之二十八:Longest Valid Parentheses
求最长合法匹配的长度,这道题可以用一维动态规划逆向求解。假设输入括号表达式为String s,维护一个长度为s.length的一维数组dp[],数组元素初始化为0。 dp[i]表示从s[i]到s[s.length - 1]包含s[i]的最长的有效匹配括号子串长度。则存在如下关系:...
分类:其他好文   时间:2014-06-04 13:52:03    阅读次数:279
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