简单题.构造出二叉搜索树,然后check一下. #include<stdio.h> #include<algorithm> using namespace std; +; struct Node { int left; int right; int val; } s[maxn]; int n; int a[maxn]; int ans[maxn],tot; int h[maxn]; int k; void dfs(int x) { ans[k++]=s[x].val; ) dfs(…

http://www.patest.cn/contests/pat-a-practise/1099 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subt…

Pat1043代码 题目描写叙述: A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only node…

题意: 输入一个正整数N(<=1000),接下来输入N个点的序号.如果刚才输入的序列是一颗二叉搜索树或它的镜像(中心翻转180°)的先序遍历,那么输出YES并输出它的后序遍历,否则输出NO. trick: for(auto it:post) cout<<it<<((it!=post[n-1])?" ":""); 这样输出会使第0,1数据点格式错误...原因未知 cout<<post[0]; for(int i=1;i<…

1043 Is It a Binary Search Tree (25 分)   A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a…

题目 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The lef subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys grea…

题目 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys gre…

A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys greate…

博主欢迎转载,但请给出本文链接,我尊重你,你尊重我,谢谢~http://www.cnblogs.com/chenxiwenruo/p/6789220.html特别不喜欢那些随便转载别人的原创文章又不给出链接的所以不准偷偷复制博主的博客噢~~ 题意:给出一个序列,问你是否是一棵二叉搜索树或者是其镜像的前序遍历.并且输出其后序遍历. 一开始没考虑到只有一个子树...比如BST78 11 9 8 10 13 12MIRROR78 11 13 12 9 10 8所以要先判断是否为BST,不是的话再判断是…

the problem is from pat,which website is http://pat.zju.edu.cn/contests/pat-a-practise/1043 and the source code is as followed. #include<iostream> #include<vector> #include<cstdio> using namespace std; int pos; struct cell { cell *lchild…

1043. Is It a Binary Search Tree (25) 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 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only…

PAT (Advanced Level) Practice 1006 Sign In and Sign Out (25 分) 凌宸1642 题目描述: At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the records of s…

1043 Is It a Binary Search Tree(25 分) A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a nod…

1043 Is It a Binary Search Tree(25 分) A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a nod…

04-树7. Search in a Binary Search Tree (25) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue To search a key in a binary search tree, we start from the root and move all the way down, choosing branches according to the comparison res…

04-树7. Search in a Binary Search Tree (25) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue To search a key in a binary search tree, we start from the root and move all the way down, choosing branches according to the comparison res…

https://pintia.cn/problem-sets/994805342720868352/problems/994805440976633856 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than th…

A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys greate…

关键在于清空字符数组和使用scanf进行输入 #include <stdio.h> #include <string.h> #include <fstream> #include <iostream> using namespace std; int main() { int num; while (scanf("%d", &num) != EOF) { char earlest[20]; char lastest[20]; ch…

#include <cstdio> #include <climits> #include <cstdlib> #include <vector> const double LO_BOUND = -1.0 + INT_MIN; const double HI_BOUND = +1.0 + INT_MAX; using namespace std; class Node { public: Node* L; Node* R; int data; Node(,…

http://www.patest.cn/contests/pat-a-practise/1097 Given a singly linked list L with integer keys, you are supposed to remove the nodes with duplicated absolute values of the keys. That is, for each value K, only the first node of which the value or a…

贪心.注意x=0处没有加油站的情况. #include<cstdio> #include<cstring> #include<cmath> #include<vector> #include<map> #include<queue> #include<stack> #include<algorithm> using namespace std; struct X { double cost, x, v; int…

At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the records of signing in's and out's, you are supposed to find the ones who have unlocked a…

This time, you are supposed to find A+B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial: K N1​ aN1​​ N2​ aN2​​ ... NK​ …

http://www.patest.cn/contests/pat-a-practise/1043 #include <stdio.h> #include <vector> using namespace std; struct Node { Node* lchild; Node* rchild; int val; }Tree[]; int loc,loc2,loc3; Node* create() { Tree[loc].lchild=NULL; Tree[loc].rchild…

题目就是给出一棵二叉搜索树,已知根节点为0,并且给出一个序列要插入到这课二叉树中,求这棵二叉树层次遍历后的序列. 用结构体建立节点,val表示该节点存储的值,left指向左孩子,right指向右孩子.中序遍历的顺序正好是序列从小到大的顺序,因此中序遍历的时候顺便赋值就可以了,最后层次遍历输出. 思路一:中序遍历的时候赋值 #include <iostream> #include <cstdio> #include <algorithm> #include <str…

#include<bits/stdc++.h> using namespace std; typedef struct node; typedef node *tree; struct node { int data; tree L,R; }; void Insert(tree &bt,int x) { if(bt==NULL){ bt=new node; bt->data=x; bt->L=NULL; bt->R=NULL; return; } if(x<bt…

1043. Is It a Binary Search Tree (25) 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 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only…

A binary search tree is provided for efficiently organizing values for a set of items, even when values are duplicated. In generating the binary search tree, the value of each item in a set of values is determined. If a particular value is unique and…

Source: PAT A1043 Is It a Binary Search Tree (25 分) Description: A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key.…