摘要：
Given the head of a linked list, reverse the nodes of the list k at a time, and return the modified list. 本题我们可以借助一个Stack来解题。我们从链表头部开始，向Stack中插入k个节点，然 阅读全文
posted @ 2022-11-05 17:29
MarkLeeBYR
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摘要：
Given a linked list, swap every two adjacent nodes and return its head. For example,Given 1->2->3->4, you should return the list as 2->1->4->3. Your a 阅读全文
posted @ 2022-11-04 09:48
MarkLeeBYR
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You are given an array of k linked-lists lists, each linked-list is sorted in ascending order. Merge all the linked-lists into one sorted linked-list 阅读全文
posted @ 2022-11-03 13:26
MarkLeeBYR
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Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: [ 阅读全文
posted @ 2022-11-03 11:02
MarkLeeBYR
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Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. public L 阅读全文
posted @ 2022-11-03 10:41
MarkLeeBYR
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Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the 阅读全文
posted @ 2022-11-03 10:14
MarkLeeBYR
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摘要：
Given a linked list, remove the nth node from the end of list and return its head. For example, Given linked list: 1->2->3->4->5, and n = 2. After rem 阅读全文
posted @ 2022-11-03 09:46
MarkLeeBYR
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Given 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 of 阅读全文
posted @ 2022-11-02 11:55
MarkLeeBYR
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Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpo 阅读全文
posted @ 2022-11-01 14:04
MarkLeeBYR
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