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Scramble String 阅读全文
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Decode Ways解题。 阅读全文
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Valid Palindrome解题实现。 阅读全文
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统计nginx日志单IP访问请求数排名 阅读全文
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awk数组使用例子一个。 阅读全文
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本文介绍工作中常用的几个linux性能查看命令：top,sar,vmstat,iostat,pidstat等。 阅读全文
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The count-and-say sequence is the sequence of integers beginning as follows:
1, 11, 21, 1211, 111221, ...
1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1211.
Given an integer n, generate the nth sequence. 阅读全文
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Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are not. 阅读全文