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题目 Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after div 阅读全文
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题目 Implement strStr(). Return the index of the first occurrence of needle in haystack, or 1 if needle is not part of haystack. Example 1: & 8195; Inpu 阅读全文
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题目 Given an array nums and a value val, remove all instances of that value in place and return the new length. Do not allocate extra space for another 阅读全文