作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 递归+队列 栈 日期 题目地址:https://leetcode.com/problems/flatten-nested-list-iterator/description/ 题目描述 Given a nested list of integers, implement an iterator to flatten it. Each element i…
题目如下: Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integers or other lists. Example 1: Input: [[1,1],2,[1,1]] Output: [1,1,2,1,1] Explanation: By call…
[LeetCode]430. Flatten a Multilevel Doubly Linked List 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list/description/ 题目描述: You are given…
Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integers or other lists. Example 1:Given the list [[1,1],2,[1,1]], By calling next repeatedly until hasNe…
Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integers or other lists. Example 1: Input: [[1,1],2,[1,1]] Output: [1,1,2,1,1] Explanation: By calling ne…
https://leetcode.com/problems/flatten-nested-list-iterator/…
[抄题]: Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integers or other lists. Example 1:Given the list [[1,1],2,[1,1]], By calling next repeatedly until…
List里可以有int或者List,然后里面的List里面可以再有List. 用Stack来做比较直观 Iterator无非是next()或者hasNext()这2个方程 一开始我想的是hasNext()就简单的返还是不是空就行,主要的操作在next()里,结果发现无线循环..好蠢 然后看网上答案改的在hasNext()里准备好,其实一开始的想法不一定错,二刷可以试试. 简单的说就是先都塞到STACK里面,如果Peek的元素是单一int就返还TRUE,然后next()会直接返还那个int. 如果…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 先序遍历 递归 日期 题目地址:https://leetcode.com/problems/flatten-binary-tree-to-linked-list/#/description 题目描述 Given a binary tree, flatten it to a linked list in-place. For example, Give…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 保存全部节点 只保留左节点 日期 题目地址:https://leetcode.com/problems/binary-search-tree-iterator/description/ 题目描述 Implement an iterator over a binary search tree (BST). Your iterator will be i…