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Traversals
通过前序遍历建立树——PTA——03-树3 Tree
Traversals
Again (25分)
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
Bruce_Xie_123
·
2020-08-14 14:02
#
数据结构与算法——树
PTA 03-树3 Tree
Traversals
Again (25 分)30行代码 -__-
03-树3TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackopera
VN-噬魂
·
2020-08-14 14:55
7-5 Tree
Traversals
Again (25 分)
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
沿麓
·
2020-08-14 14:46
数据结构
PTA
03-树3 Tree
Traversals
Again (25 分)
03-树3TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackopera
asianleolion
·
2020-08-14 14:42
DS
1086 Tree
Traversals
Again (25分)--PAT甲级真题
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
SamsonKun
·
2020-08-14 13:48
PAT
PTA 03-树3 Tree
Traversals
Again
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
lv666lv
·
2020-08-14 13:02
数据结构
《数据结构》03-树3 Tree
Traversals
Again
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
叫我皮卡丘
·
2020-08-14 13:57
数据结构
数据结构(浙大)
浙大数据结构pta——03-树3:Tree
Traversals
Again (25分)
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
leslie___
·
2020-08-14 13:46
数据结构:树和二叉树
7-5 Tree
Traversals
Again
7-5TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperati
昔之得一者
·
2020-08-14 13:14
Data
Structures
and
Algorithms
03-树3 Tree
Traversals
Again
根据题目:入栈的顺序即为先序遍历的顺序出栈的顺序即为中序遍历的顺序然后根据先序遍历、中序遍历来构建二叉树AC代码#include#include#include#include#includeusingnamespacestd;typedefstructTreeNode*BinTree;structTreeNode{intdata;BinTreeLeft;BinTreeRight;};intfla
M_cry
·
2020-08-14 13:12
PAT(A)
03-树3 Tree
Traversals
Again(25 分)
03-树3TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackopera
centralunit
·
2020-08-14 13:00
C语言
PTA-中国大学MOOC-陈越
何钦铭-数据结构-2019春
浙大数据结构习题笔记:03-树3 Tree
Traversals
Again (25分)
03-树3TreeTraversalsAgain(25分)分析看了下视频解析,觉得除了常规的借助先序与中序遍历把这棵树重新构造出来再遍历外,视频中借助规律和递归分治法真的是很简洁。主函数中,在题中可以明白,Push进去的是先序的内容,Pop出去的是中序的内容,这样遍历完成所有输入后,可以得到prein两个代表先序与后序遍历的数组。之后,关键是围绕着这两个数组找出后序post的顺序,我们发现一些规律
Jimobbb
·
2020-08-14 13:31
数据结构
数据结构
算法
栈
stack
7-5 Tree
Traversals
Again
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
弱爆了的雪饼
·
2020-08-14 13:11
算法与数据结构
PTA
03-树3 Tree
Traversals
Again(25 分)
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
_a_dai_
·
2020-08-14 13:35
数据结构(Data
Structure)
PTA03-树3 Tree
Traversals
Again
先写下题目吧。Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(
mamabinbinbin
·
2020-08-14 13:28
数据结构
遍历
数据结构
PTA
Binary Tree
Traversals
HDU - 1710 (二叉树求后序)
BinaryTreeTraversalsHDU-1710Abinarytreeisafinitesetofverticesthatiseitheremptyorconsistsofarootrandtwodisjointbinarytreescalledtheleftandrightsubtrees.Therearethreemostimportantwaysinwhichtheverticeso
初吻--给了奶嘴
·
2020-08-13 19:53
二叉树
二叉树
Binary Tree
Traversals
的解释与AC代码
真正的原创在这里我不过是照着这位博主打的代码题意:给出一一棵二叉树的前序和中序,输出后序举例:前序:124735896中序:472185936后序:742895631函数OUTPUT的奥妙:一个奇妙的特性:当我们将前序和后序对比时,发现一个节点的子树总是在前序里该节点的后面,后序里该节点的前面(这当然不难理解),所以同时满足这两个条件的就是该节点的子树。我们只需要逐步缩小子树,就能最终找到树的末端
是丰兄啊
·
2020-08-12 17:07
数据结构
PAT 1119 Pre- and Post-order
Traversals
(30分)
1119Pre-andPost-orderTraversals(30分)Supposethatallthekeysinabinarytreearedistinctpositiveintegers.Auniquebinarytreecanbedeterminedbyagivenpairofpostorderandinordertraversalsequences,orpreorderandinord
luer9
·
2020-08-12 15:34
PAT
数据结构
Tree
Traversals
1020.TreeTraversals(25)时间限制400ms内存限制65536kB代码长度限制16000B判题程序Standard作者CHEN,YueSupposethatallthekeysinabinarytreearedistinctpositiveintegers.Giventhepostorderandinordertraversalsequences,youaresupposedt
ForABiggerWorld
·
2020-08-12 00:09
1020 Tree
Traversals
(25 分)从后序和中序得到层次遍历(模版)
Supposethatallthekeysinabinarytreearedistinctpositiveintegers.Giventhepostorderandinordertraversalsequences,youaresupposedtooutputthelevelordertraversalsequenceofthecorrespondingbinarytree.InputSpecif
rnzhiw
·
2020-08-09 11:52
PAT甲级
PAT甲级1020 Tree
Traversals
1020TreeTraversals(25分)思路:层序遍历的变形,用队列存储左右子树,只不过这个左右子树是根据后序和中序推导得到的;#includeusingnamespacestd;vectorlevel;voidtolevel(vectorpost,vectorin){queue>ps,is;vectortmp;tmp.push_back(0);tmp.push_back(post.size
qq_33231894
·
2020-08-09 10:03
PAT甲级刷题历程
Tree
Traversals
(已知后序和中序求层次遍历)
1020.TreeTraversals(25)时间限制400ms内存限制65536kB代码长度限制16000B判题程序Standard作者CHEN,YueSupposethatallthekeysinabinarytreearedistinctpositiveintegers.Giventhepostorderandinordertraversalsequences,youaresupposedt
ninesun127
·
2020-08-09 10:41
二(多)叉树
PAT
HDU1710(Binary Tree
Traversals
)
[align=center]BinaryTreeTraversals[/align]ProblemDescriptionAbinarytreeisafinitesetofverticesthatiseitheremptyorconsistsofarootrandtwodisjointbinarytreescalledtheleftandrightsubtrees.Therearethreemost
tianxuanlove
·
2020-08-04 01:00
树
数据结构与算法
pta 甲级1119 Pre- and Post-order
Traversals
(30分)
链接:https://pintia.cn/problem-sets/994805342720868352/problems/994805353470869504题意:给出二叉树的前序、后序遍历序列,能否唯一确定一棵树?输出中序遍历序列。思路:能否确定一棵树关键在于是否有只有一个孩子的节点。如果有,那么就无法确定唯一的树。至于怎么确定中序遍历序列,可以先根据后序序列确定右孩子,通过前序序列确定左右子
Qingo呀
·
2020-07-31 16:01
=====PTA=====
1020 Tree
Traversals
Supposethatallthekeysinabinarytreearedistinctpositiveintegers.Giventhepostorderandinordertraversalsequences,youaresupposedtooutputthelevelordertraversalsequenceofthecorrespondingbinarytree.InputSpecif
绿蚁.r
·
2020-07-29 15:59
PAT甲级练习
PAT1086:Tree
Traversals
Again【Java实现】——改进版
之前的解法是:得到前序和中序遍历,建立二叉树,然后输出后序遍历后来经过陈越老师的讲解才知道,其实没有必要去建立二叉树,知道前序和中序的情况下,可以直接利用递归求得后续遍历Java代码如下:importjava.util.Scanner;importjava.util.Stack;/***TreeTraversalsAgain之前已经写了一篇博客,但后来发现那并不是最优的解法*原来知道树的前序中序遍
JacobGo
·
2020-07-12 20:01
数据结构
浙江大学陈越课后题系列
Tree
Traversals
Again (25)
问题描述:输入显示的是中序遍历非递归,栈的操作,输出树的后序遍历问题关键push的顺序为先序遍历,pop的顺序为中序遍历问题转换为由先序遍历、中序遍历求后续遍历/*=============================================================================#COPYRIGHTNOTICE#Copyright(c)2015##@Autho
周大侠
·
2020-07-12 15:54
PAT-MOOC-DS
03-树3 Tree
Traversals
Again (25分)
03-树3TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackopera
Kavin_Liang
·
2020-07-11 22:13
二叉树
数据结构
03-树3 Tree
Traversals
Again (25 分)
【mooc上姥姥提供的代码】#include#include#include#includeusingnamespacestd;constintmaxn=100;intpre[maxn],in[maxn],post[maxn];voidsolve(intPreL,intinL,intpostL,intn){if(n==0)return;if(n==1){post[postL]=pre[PreL];
扯淡_yl
·
2020-07-11 18:21
陈越
何钦铭数据结构2018秋
Tree
Traversals
Again (25) PAT甲级刷题
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
有希N
·
2020-07-11 16:07
Tree
Traversals
Again (25)
pat1086.TreeTraversalsAgain(25)时间限制200ms内存限制32000kB代码长度限制16000B判题程序Standard作者CHEN,YueAninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytr
快乐松鼠蹦蹦跳
·
2020-07-11 13:11
pat题解
C语言 03-树3 Tree
Traversals
Again
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
闲不下来的王小C
·
2020-07-11 12:01
数据结构与算法
解题报告-PAT- Tree
Traversals
Again(1086)
解题报告-PAT-TreeTraversalsAgainTreeTraversalsAgain有两种解题思路:1、在Push和Pop的过程中记录后序序列。2、构造先序序列和中序序列,然后build后序序列。PAT原题链接:https://www.patest.cn/contests/pat-a-practise/1086下面给出两种算法:算法1:#include#include#include#d
seeker1994
·
2020-07-11 11:36
ACMer养成
Tree
Traversals
Again (25)
importjava.util.Scanner;classTreeNode{intval;TreeNodeleft;TreeNoderight;TreeNode(intval){this.val=val;}}/****结题思路:根据输入,构建二叉树。每当一行读入为Push,就在new一个节点给父节点对应的儿子。每当一行读入为Pop,就返回null给父节点对应的儿子。*/publicclassMai
litoupu
·
2020-07-11 11:46
JAVA
About
Offer
PAT--Tree
Traversals
Again (25)--找规律。。
题目地址:http://www.patest.cn/contests/mooc-ds2015spring/03-树2这道题陈越老师的解法太赞了。push进去的数字序列就是前序,而pop()出来的序列就是后序,so...剩下的我就不说了,前序中序求后续是很经典的递归,如果不清楚可以百度一下~我这道题的解法是通过找规律建树,囧。规律就是:在push时,看一看上一个操作是不是push,如果是,则插到上一
grooowing
·
2020-07-11 06:48
算法OJ
PAT A1086 Tree
Traversals
Again
//最后一个测试点答案错误,不知道错在哪里了,4分//又忘记了usingnamespacestd;//用scanf()根本不需要清空!直接每次scanf()就行了//用string好清空。注意string一定要用cin输入!#include#include#include#include//#include//#defineLOCALusingnamespacestd;intinorder[30]
daisyleedq
·
2020-07-11 04:08
PAT
PAT
算法
c++
二叉树
栈
Tree
Traversals
Again (25)
原题:1086.TreeTraversalsAgain(25)解题思路:实际上入栈顺序就是前序遍历,出栈顺序就是中序遍历,那么有了两个遍历就可以直接构造一个二叉树,后续遍历也就可以直接得到。代码如下:#include#include#include#includeusingnamespacestd;constintmaxn=30+5;structNode{intid;Node*lchild,*rc
吹风的四月
·
2020-07-11 04:36
PAT
PAT 甲级 1086 Tree
Traversals
Again
1086TreeTraversalsAgain(25point(s))Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestac
漫浸天空的雨色
·
2020-07-11 01:22
PAT甲级
PAT甲级/乙级机试经验
Tree
Traversals
Again (25)
题目Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);pu
R11happy
·
2020-07-10 23:12
PAT甲级
Tree
Traversals
Again (25)
Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2);push
Andrewseu
·
2020-07-10 20:24
PAT
1086 Tree
Traversals
Again
题目大意:用栈的输出表示二叉树的中序遍历,要求输出二叉树的后序遍历序列。解题思路:题目隐含了入栈的顺序就是先序遍历的序列,根据这个构建出二叉树然后后序输出即可。代码如下:#include#include#include#include#include#include#include#include#include#include#include#include#include#include#in
Apollo-yyy
·
2020-07-10 20:06
算法
数据结构-树
PAT甲级
PAT甲级部分练习题题解
Tree
Traversals
Again(PAT)
1.题目描述Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperationsare:push(1);push(2
小-黯
·
2020-07-10 18:19
#
PAT甲级(Advanced
Level)练习题
算法
C语言
1020 Tree
Traversals
(25分)
1.层次遍历2.不一定是完全二叉树,所以level存储后输出要注意3.由于不一定是完全二叉树,所以数组大小需要给够不然会段错误或者答案错误除此之外在先序遍历时存储,根结点需要注意找对。#includeusingnamespacestd;constintN=1000000+5;intin[N],po[N];//中后intlevel[N];voidpre(introot,intl,intr){//先序
KLFTESPACE
·
2020-07-06 22:22
PAT
二叉树
1119 Pre- and Post-order
Traversals
(30分)
前序遍历+后序遍历确定中序遍历(不一定唯一)用前序遍历的下一个根结点在后续遍历中查找所在位置确定子树节点个数,两个节点之间的节点数即为子树节点数,然后子树根结点是子树前序遍历起始位置。由先序遍历根左右(根和子根好确定)的性质推知需要在后序遍历中查找子树节点数#includeusingnamespacestd;constintmaxn=35;intpre[maxn],post[maxn];boolf
KLFTESPACE
·
2020-07-06 22:22
PAT
二叉树
1086 Tree
Traversals
Again (25 分)
1086TreeTraversalsAgain(25分)Aninorderbinarytreetraversalcanbeimplementedinanon-recursivewaywithastack.Forexample,supposethatwhena6-nodebinarytree(withthekeysnumberedfrom1to6)istraversed,thestackoperat
iimT
·
2020-07-05 18:39
PAT全解析
PAT
二叉树_Binary Tree
Traversals
sourceDescriptionAbinarytreeisafinitesetofverticesthatiseitheremptyorconsistsofarootrandtwodisjointbinarytreescalledtheleftandrightsubtrees.Therearethreemostimportantwaysinwhichtheverticesofabinarytre
Gitfan
·
2020-06-28 19:40
PAT (Advanced Level) Practice 1086 Tree
Traversals
Again
根据操作写递归就行了,注意一点,data不是从1到n顺序来的,所以要自己去获取push后面的数字,不能简单的用计数器++。#include#include#include#includeusingnamespacestd;structnode{node*lchild;node*rchild;intdata;};vectorv;stringop[100];intindex=0,n;node*crea
唐流雨
·
2020-06-25 18:29
数据结构集合——Map四种遍历元素的方式
packagecom.map.
traversals
;importjava.util.
qi_ming88
·
2020-06-24 21:09
java基础
1020 Tree
Traversals
(25分)
Supposethatallthekeysinabinarytreearedistinctpositiveintegers.Giventhepostorderandinordertraversalsequences,youaresupposedtooutputthelevelordertraversalsequenceofthecorrespondingbinarytree.InputSpecif
小小字节
·
2020-06-18 16:00
Tree
Traversals
- Hard Version
Giventhepartialresultsofabinarytree'straversalsinin-order,pre-order,andpost-order.Youaresupposedtooutputthecompleteresultsandthelevelordertraversalsequenceofthecorrespondingtree.InputSpecification:Eac
一斜星辰酱
·
2020-02-09 00:00
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