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摘要： 3SumGiven an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum... 阅读全文

摘要： 4SumGiven an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target?Find all unique quadruplets in the array w... 阅读全文

摘要： Two SumGiven an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the... 阅读全文

摘要： Divide Two IntegersDivide two integers without using multiplication, division and mod operator.If it is overflow, return 2147483647ExampleGiven divide... 阅读全文