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题目： Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. (Easy) 分析： 不用考虑KMP啥的 阅读全文
摘要：
题目： Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate extra space for another array, 阅读全文
摘要：
题目： Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra spac 阅读全文