摘要：
Search Insert PositionGiven a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if ... 阅读全文
摘要：
Swap Nodes in PairsGiven a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2-... 阅读全文
摘要：
Multiply StringsGiven two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbitrarily large ... 阅读全文