题目题意：已知前序和中序，输出后序的第一
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2023-06-27 10:23:29
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Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to out
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2020-04-16 00:40:00
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Given a binary tree, return thepostordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[3,2,1].这道...
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2021-08-07 11:59:19
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Problem link: https://leetcode.com/problems/binary-tree-postorder-traversal/ Constraint: Idea: We could do it either in recursive or iterative way. Co ...
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2021-07-27 23:45:00
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1138 Postorder Traversal （25 point(s)）Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to outpu
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2022-09-15 11:02:03
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Question Given a binary tree, return the postorder traversal of its nodes’ values.For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3return [3,2,1].Note: Recursive solu
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2023-02-02 14:52:45
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Given a binary tree, retu3return[3,2,1]. Note: Recursive solution is trivial
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2023-06-01 17:25:19
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题目： Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Note
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2018-04-09 09:10:00
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题目描写叙述： Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1].
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2017-06-07 16:09:00
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#include<iostream>#include<stdio.h>#include<stdlib.h>#include<math.h>#include<string.h>#include<algorithm> #include<map>#include<vector>#inclu...
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2022-07-14 10:18:06
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1.题目Given a binary tree, return the postorder traversal of its nodes' values.For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3return [3,2,1].Note: Recursive solution is trivial, co
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2022-08-01 17:26:42
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Given a binary tree, return thepostordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[3,2,1].No...
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2014-06-18 22:50:00
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水~。 const int N=50010; int pre[N],in[N]; unordered_map<int,int> pos; int ans=-1; int n; void build(int prel,int prer,int inl,int inr) { if(prel > prer
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2021-03-03 22:37:00
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Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to out
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2017-12-23 15:02:00
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145. Binary Tree Postorder Traversal1. 题目Given the root of a binary tree, return the postorder traversal of its nodes’ values.Follow up: Recursive solution is trivial, could you do it iteratively?Example1:Input: root = [1,null,2,3]Output: [3,2,1]
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2021-05-20 22:17:48
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Given a binary tree, return the postorder traversal of its nodes' values. Example: LinkedList有addFirst方法，巧妙。
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2019-08-28 01:12:00
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Given a binary tree, return thepostordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[3,2,1].No...
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2015-02-09 12:40:00
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1138 Postorder Traversal C++版1.题意给出一个先序序列和一个中序序列，让你求出其后序序列的第一个数。2.分析2.1 方法1这题直接可以用构建一棵二叉树的方法去做，但是会得到两个超时的用例。所以不可取。2.2 方法2既然想直接通过构建二叉树的方法得到后序序列不大可能，那么就应该使用其他方法去思考这题的解决。是否可以不用通过构建树的方式去得到答案？肯定是可以的...
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2021-07-08 11:33:43
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1138 Postorder Traversal C++版1.题意给出一个先序序列和一个中序序列，让你求出其后序序列的第一个数。2.分析2.1 方法1这题直接可以用构建一棵二叉树的方法去做，但是会得到两个超时的用例。所以不可取。2.2 方法2既然想直接通过构建二叉树的方法得到后序序列不大可能，那么就应该使用其他方法去思考这题的解决。是否可以不用通过构建树的方式去得到答案？肯定是可以的...
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2022-01-26 09:57:56
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Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Note: Re
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2021-08-07 09:45:52
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