题目链接：LRU CacheDesign and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set.get(key) - Get the val...
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题目链接：Binary Tree Postorder TraversalGiven a binary tree, return the postorder traversal of its nodes’ values.For example:Given binary tree {1,#,2,3}, 1 \ 2 ...
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题目链接：Binary Tree Preorder TraversalGiven a binary tree, return the preorder traversal of its nodes’ values.For example:Given binary tree {1,#,2,3}, 1 \ 2 ...
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题目链接：Reorder ListGiven a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes’ values.For e...
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题目链接：Linked List Cycle IIGiven a linked list, return the node where the cycle begins. If there is no cycle, return null.Follow up:Can you solve it without using extra ...
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题目链接：Linked List CycleGiven a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?这道题的要求是判断一个链表中是否有环。设置两个指针fast和slow，初始...
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题目链接：Word BreakGiven a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.For exa...
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题目链接：Copy List with Random PointerA linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Re...
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题目链接：Single Number IIGiven an array of integers, every element appears three times except for one. Find that single one.Note:Your algorithm should have a linear runtim...
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题目链接：Single NumberGiven an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complex...
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