1127 ZigZagging on a Tree (30 分) Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequences. And it is a simple standard routine to pr…

1127. ZigZagging on a Tree (30) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino…

PAT甲级1127. ZigZagging on a Tree 题意: 假设二叉树中的所有键都是不同的正整数.一个唯一的二叉树可以通过给定的一对后序和顺序遍历序列来确定.这是一个简单的标准程序,可以按顺序打印数字.但是,如果您认为问题太简单,那么您太天真了. 这次你应该以"锯齿形顺序"打印数字 - 也就是说,从根开始,逐级打印数字,从左到右交替,从右到左.例如,对于以下树,您必须输出:1 11 5 8 17 12 20 15. 输入规格: 每个输入文件包含一个测试用例.对于每种情况,第…

1127 ZigZagging on a Tree (30 分) Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequences. And it is a simple standard routine to pr…

1127. ZigZagging on a Tree (30) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino…

https://pintia.cn/problem-sets/994805342720868352/problems/994805349394006016 Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequenc…

Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequences. And it is a simple standard routine to print the numbers in level-order. H…

题目 Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequences. And it is a simple standard routine to print the numbers in level-order…

根据中序遍历和前序遍历确定一棵二叉树,然后按“层次遍历”序列输出.输出规则:除根节点外,接下来每层的节点输出顺序是:先从左到右,再从右到左,交替输出 #include <iostream> #include <cstdio> #include <algorithm> #include <string.h> #include <string> #include <map> #define LEFT 0 #define RIGHT 1 u…

题意:中序序列+后序序列构建二叉树,之字形输出其层序序列. 思路:在结点的数据域中额外增加一个layer表示结点所在的层次,并定义vector<int> zigzag[maxn]存放最终结果.按照常规顺序进行层序遍历,将第i层的值存入到zigzag[i]中,最后输出时,第偶数层从左向右输出,第奇数层反之. 代码: #include <cstdio> #include <queue> #include <vector> using namespace std;…