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解压缩： tar 解压：x 压缩 c 有gzip属性的：z 产生大量log输出的：v 制定gz压缩包的名字：-f 参考：http://www.cnblogs.com/jyaray/archive/2011/04/30/2033362.html 阅读全文
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这类问题可以先用递归思考，再反过来想出动态规划的方法。 10. Regular Expression Matching 32. Longest Valid Parentheses 44. Wildcard Matching 72. Edit Distance 97. Interleaving Str 阅读全文
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121. Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitte 阅读全文
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lo和hi都是inclusive的。 返回的数组中，index小于j的数都小于等于j，index大于j的数都大于等于j 阅读全文
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procedure three-way-partition(A : array of values, mid : value): i ← 0 j ← 0 n ← size of A - 1 while j ≤ n: if A[j] < mid: swap A[i] and A[j] i ← i + 阅读全文
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很开心，自己想出来的一道题 There is a list of sorted integers from 1 to n. Starting from left to right, remove the first number and every other number afterward un 阅读全文
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169. Majority Element Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. Y 阅读全文