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[LeetCode] Longest Substring Without Repeating Characters
Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters fo...
分类:其他好文   时间:2014-11-23 14:21:58    阅读次数:205
c++ how to make your own class a valid key type for std::map?
In Java, if you want your own class to be a valid key type of the container, you just need to make it implement the interface "Comparable", and then i...
分类:编程语言   时间:2014-11-22 22:51:01    阅读次数:272
安装ruby on rails一直报Unable to download data from https://rubygems.org/的解决方案
如题,在用gem install rails时一直报这个错误,完整的错误信息如下: ERROR:  Could not find a valid gem 'rails' (>= 0), here is why:           Unable to download data from https://rubygems.org/ - Errno::ETIMEDOUT: Connection ...
分类:Web程序   时间:2014-11-22 10:40:23    阅读次数:186
[leetcode]Read N Characters Given Read4
用read4实现readn...至调用一次,感觉怎么搞都可以。。。估计这个题有II就是调用多次了。。。感觉多次勇哥buffer存下多读的那部分就好了。。。// Forward declaration of the read4 API.int read4(char *buf);class Soluti...
分类:其他好文   时间:2014-11-22 00:36:13    阅读次数:259
CodeForces 486D Valid Sets
题意: 给定一棵n(2000)个节点的树  每个节点上有个数字  问  有多少棵子树满足树中最大数字与最小数字的差不超过d 思路: 根据数据猜复杂度可能为n^2  想到尝试树形dp 假如枚举现在树中的最大值  那么最小值可以求出  这时不在数值范围内的节点都可以标记掉 那么假设这个最大值的点我一定选取  那么就可以dp出一定选这个点的情况下子树的种类数 假设u是父节点  v是子节点...
分类:其他好文   时间:2014-11-21 21:56:47    阅读次数:212
LeetCode: Longest Valid Parentheses 解题报告
Longest Valid ParenthesesGiven a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses sub...
分类:其他好文   时间:2014-11-21 20:31:10    阅读次数:235
Leetcode-Longest Valid Parentheses
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring.For "(()", the lon...
分类:其他好文   时间:2014-11-21 14:00:49    阅读次数:172
Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
分类:其他好文   时间:2014-11-21 12:15:28    阅读次数:149
Valid Password
ProblemIn 1-9 keypad one key is not working. If someone enters a password then not working key will not be entered. You have given expected password a...
分类:其他好文   时间:2014-11-21 06:58:11    阅读次数:197
Well-ordered String
ProblemYou know a password is well-ordered string. Well-ordered string means that the order of the characters is in an alphabetical increasing order. ...
分类:其他好文   时间:2014-11-21 06:55:50    阅读次数:137
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