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https://leetcode.com/problems/reverse-linked-list 递归/迭代

//很全面
https://leetcode.com/problems/reverse-linked-list/discuss/58130/C%2B%2B-Iterative-and-Recursive

445. Add Two Numbers II

https://leetcode.com/problems/longest-common-prefix/ solution里面有四种解法，横竖搜索+分治+二分

328. Odd Even Linked List https://leetcode.com/problems/odd-even-linked-list/

426. Convert Binary Search Tree to Sorted Doubly Linked List https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list