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Problem:You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the q... 阅读全文
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Problem:Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Thesamerepe... 阅读全文
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Problem:The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...1is read off as"one 1"or11.11is read o... 阅读全文
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Problem:Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents you... 阅读全文
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Problem:Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not... 阅读全文
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Problem:Divide two integers without using multiplication, division and mod operator.If it is overflow, return MAX_INT.Analysis:The question is not har... 阅读全文
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Problem:Given a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new length.Do not allocate extra spa... 阅读全文
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Problem:Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Yo... 阅读全文
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Problem:Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the... 阅读全文
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Problem:Implement regular expression matching with support for'.'and'*'.'.' Matches any single character.'*' Matches zero or more of the preceding ele... 阅读全文