Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST'...
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其他好文 时间：
2014-11-29 06:36:51
阅读次数：
160
今日需要删除/tmp目录下的所有文件，文件数量比较多。
ls -lt /tmp | wc -l385412
使用 rm * 后，系统提示错误 Argument list too long
原因是在linux下，试图传太多参数给一个系统命令(ls *; cp *; rm *; cat *; etc..)时，就会出现 Argument list too long错误。...
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系统相关 时间：
2014-11-29 00:19:15
阅读次数：
273
描述Given two strings A and B, whose alphabet consist only ‘0’ and ‘1’. Your task is only to tell how many times does A appear as a substring of B? For ...
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其他好文 时间：
2014-11-29 00:03:11
阅读次数：
442
TransportationRuratania is just entering capitalism and is establishing new enterprising activities in many fields including transport. The transporta...
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其他好文 时间：
2014-11-28 20:10:08
阅读次数：
362
The AD736 true-rms-to-dcconverter is useful for many applications that require precise calculation of the rms value of a waveform. This converter can ...
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其他好文 时间：
2014-11-28 16:14:22
阅读次数：
142
Short-circuit protection is an obvious requirement for a power supply, especially when its load connects to a cable that's subject to damage. Many mod...
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其他好文 时间：
2014-11-28 16:04:06
阅读次数：
149
AC signals can emanate from many sources, and many of these sources are incompatible with the most popular interface voltages, such as TTL. A temptati...
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其他好文 时间：
2014-11-28 14:13:40
阅读次数：
190
Low-ripple-voltage positive-to-negative dc/dc converters find use in many of today's high- frequency and noise-sensitive disk drives, battery-powered ...
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其他好文 时间：
2014-11-28 14:08:43
阅读次数：
251
直连网分为两种，point-to-point link和multiple access link， 如图：对一个网络数直连网个数时，以上两种link都要计算。例子如下：1. How many directly-connected networks are there on the route fro...
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Web程序 时间：
2014-11-28 08:41:38
阅读次数：
259
angry_birds_again_and_again
Time Limit: 2000ms Memory limit: 65536K 有疑问？点这里^_^
题目描述
The problems called "Angry Birds" and "Angry Birds Again and Again" has been solved by many ...
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其他好文 时间：
2014-11-27 22:11:30
阅读次数：
392
