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First Missing PositiveGiven an unsorted integer array, find the first missing positive integer.For example,Given[1,2,0]return3,and[3,4,-1,1]return2.Yo... 阅读全文
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Insertion Sort ListSort a linked list using insertion sort.很简单的一道题，思路跟数组的插入排序一样/** * Definition for singly-linked list. * struct ListNode { * int ... 阅读全文
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Merge k Sorted ListsMergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity./** * Definition for singly-linked... 阅读全文