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[TOC]

#Record

LinkedList

Problem Tag Difficulty
24.两两交换链表中的节点 LinkedList Medium
61.旋转链表 LinkedList Medium
109.有序链表转换二叉搜索树 LinkedList、DFS Medium
142.环形链表 II LinkedList Medium
146.LRU 缓存机制 Double LinkedList、HashMap Medium
160.相交链表 LinkedList Easy

Stack

Problem Tag Difficulty
232.用栈实现队列 Stack Easy
394.字符串解码 Stack、DFS Medium
768.最多能完成排序的块 Stack、Hashmap Hard
1381.设计一个支持增量操作的栈 Stack、Prefix Sum Medium

Tree

Problem Tag Difficulty
100.相同的树 DFS Easy
104.二叉树的最大深度 DFS Easy
129.求根到叶子节点数字之和 DFS Medium
297.二叉树的序列化与反序列化 BFS Hard
513.找树左下角的值 DFS、BFS Medium
987.二叉树的垂序遍历 BFS、Sort Medium

Hashmap

Problem Tag Difficulty
1.两数之和 Hashmap Easy

Other

Problem Tag Difficulty
821.最短字符的距离 Union-Find Easy
989.数组形式的整数加法 Array Easy

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