題目: Given a binary tree, flatten it to a linked list in-place. For example, Given The flattened tree should look like: 1 TreeNode ...
原題地址:http: oj.leetcode.com problems flatten binary tree to linked list 題意: Given a binary tree, flatten it to a linked list in place. For example,Given The flattened tree should look like: If you noti ...
2014-05-10 22:55 0 3394 推薦指數:
題目: Given a binary tree, flatten it to a linked list in-place. For example, Given The flattened tree should look like: 1 TreeNode ...
Given a binary tree, flatten it to a linked list in-place. For example,Given The flattened tree should look like: If you notice carefully ...
Given a binary tree, flatten it to a linked list in-place. For example,Given The flattened tree should look like: click to show hints. ...
給定一刻二叉樹,將二叉樹按照前序遍歷的順序轉為單鏈表,右指針指向next,左指針指向None 1、分治法:將左、右子樹變為單鏈表,分別返回左右鏈表的最后一個節點,讓左鏈表的最后一個節點指向右節點的第 ...
看起來很難,但是仔細想一下,實質就是二叉樹的中序遍歷的問題,中序遍歷有遞歸和非遞歸(至少兩種寫法)。 遞歸: 非遞歸 Divide a ...
原題鏈接在這里:https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list/description/ 題目: You are given a doubly linked list which in addition ...
原題地址:http://oj.leetcode.com/problems/convert-sorted-list-to-binary-search-tree/ 題意:將一條排序好的鏈表轉換為二叉查找樹,二叉查找樹需要平衡。 解題思路:兩個思路:一,可以使用快慢指針來找到中間的那個節點 ...
原題地址:http://oj.leetcode.com/problems/linked-list-cycle/ 題意:判斷鏈表中是否存在環路。 解題思路:快慢指針技巧,slow指針和fast指針開始同時指向頭結點head,fast每次走兩步,slow每次走一步。如果鏈表不存在環,那么fast ...