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Substring with Concatenation of All Words (H) 题目 You are given a string, s, and a list of words, words, that are all of the same length. Find all star 阅读全文
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Divide Two Integers (M) 题目 Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Retur 阅读全文
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Implement strStr() (E) 题目 Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 阅读全文
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Remove Element (E) 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 extr 阅读全文
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Remove Duplicates from Sorted Array (E) 题目 Given a sorted array nums, remove the duplicates in-place such that each element appear only once and retur 阅读全文