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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