Source: PAT A1126 Eulerian Path (25 分) Description: In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were fi…

In graph theory, a Eulerian trail (or Eulerian path) is a trail in a graph which visits every edge exactly once. Similarly, an Eulerian circuit or Eulerian cycle is an Eulerian trail which starts and ends on the same vertex. Hierholzer's algorithm 可以…

1126. Eulerian Path (25) 时间限制 300 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts…

In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard Euler while solving the fa…

In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard Euler while solving the fa…

1126 Eulerian Path (25 分) In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard…

1126. Eulerian Path (25) 时间限制 300 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts…

https://pintia.cn/problem-sets/994805342720868352/problems/994805349851185152 In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the…

1126 Eulerian Path (25 分) In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard…

我是先在CSDN上发布的这篇文章:https://blog.csdn.net/weixin_44385565/article/details/89155050 1126 Eulerian Path (欧拉图的判断) In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian pat…

In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard Euler while solving the fa…

In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard Euler while solving the fa…

In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard Euler while solving the fa…

1126 Eulerian Path (25 分) In graph theory, an Eulerian path is a path in a graph which visits every edge exactly once. Similarly, an Eulerian circuit is an Eulerian path which starts and ends on the same vertex. They were first discussed by Leonhard…

题目已经告诉如何判断欧拉回路了,剩下的有一点要注意,可能图本身并不连通. 所以这里用并查集来判断图的联通性. #include <iostream> #include <cstdio> #include <algorithm> #include <string.h> #include <string> using namespace std; /* 并查集用来判断图的联通性,有一组样例图是不连通的... */ ; ]; struct UF{ in…

题意:若图是连通图,且所有结点的度均为偶数,则称为Eulerian:若有且仅有两个结点的度为奇数,则称为semi-Eulerian.现给出一个图,要我们判断其是否为Eulerian,semi-Eulerian还是not-Eulerian. 思路:在数据输入的时候计算各个节点的度:在输出各个节点的度的同时记录度为奇数的结点个数:最后判断判断图是否连通.这种题不考察什么算法,关键要我们理解题意,往往都是很简单的! 代码: #include <cstdio> #include <cstring…

无向连通图,输出每个顶点的度并判断Eulerian.Semi-Eulerian和Non-Eulerian这3种情况,我们直接记录每个点所连接的点,这样直接得到它的度,然后利用深度优先和visit数组来判断图是否连通,不连通直接是Non-Eulerian情况,连通的话再判断顶点的度是否都是偶数,是的话就是Eulerian情况,不是的话再判断它奇数度的个数是否为2个,也就是偶数比总顶点数少2个,是的话就是就是Semi-Eulerian情况了. #include<bits/stdc++.h> usi…

    Programming Contest Problem Types Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems s…

原题链接在这里:https://leetcode.com/problems/reconstruct-itinerary/ 题目: Given a list of airline tickets represented by pairs of departure and arrival airports [from, to], reconstruct the itinerary in order. All of the tickets belong to a man who departs fro…

刷题备忘录,for bug-free leetcode 396. Rotate Function 题意: Given an array of integers A and let n to be its length. Assume Bk to be an array obtained by rotating the array A k positions clock-wise, we define a "rotation function" F on A as follow: F(k…

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/6102219.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~~ 时隔两年,又开始刷题啦,这篇用于PAT甲级题解,会随着不断刷题持续更新中,至于更新速度呢,嘿嘿,无法估计,不知道什么时候刷完这100多道题. 带*的是我认为比较不错的题目,其它的难点也顶多是细节处理的问题~ 做着做着,发现有些题目真的是太水了,都不想写题解了…

▶ 书中第四章部分程序,包括在加上自己补充的代码,图中找欧拉路径 ● 无向图中寻找欧拉路径,只注释了与欧拉环不同的地方 package package01; import edu.princeton.cs.algs4.StdOut; import edu.princeton.cs.algs4.StdRandom; import edu.princeton.cs.algs4.GraphGenerator; import edu.princeton.cs.algs4.Graph; import ed…

▶ 书中第四章部分程序,包括在加上自己补充的代码,图中找欧拉环 ● 无向图中寻找欧拉环 package package01; import edu.princeton.cs.algs4.StdOut; import edu.princeton.cs.algs4.StdRandom; import edu.princeton.cs.algs4.GraphGenerator; import edu.princeton.cs.algs4.Graph; import edu.princeton.cs.a…

刷题备忘录,for bug-free 招行面试题--求无序数组最长连续序列的长度,这里连续指的是值连续--间隔为1,并不是数值的位置连续 问题: 给出一个未排序的整数数组,找出最长的连续元素序列的长度. 如: 给出[100, 4, 200, 1, 3, 2], 最长的连续元素序列是[1, 2, 3, 4].返回它的长度:4. 你的算法必须有O(n)的时间复杂度 . 解法: 初始思路 要找连续的元素,第一反应一般是先把数组排序.但悲剧的是题目中明确要求了O(n)的时间复杂度,要做一次排序,是不能达…

section1.1主要包括四道题和两个编程知识介绍.下面将对这6个部分内容进行学习. Your Ride Is Here 这道题没什么难度,读懂题目意思就行:把两个字符串按照题目要求转换成数字,然后对47取模,比较是否相等. 代码如下 /* LANG: JAVA TASK: ride */ import java.io.*; import java.util.*; public class ride { public static void main (String [] args) thro…

树(23) 备注 1004 Counting Leaves   1020 Tree Traversals   1043 Is It a Binary Search Tree 判断BST,BST的性质 1053 Path of Equal Weight   1064 Complete Binary Search Tree 完全二叉树的顺序存储,BST的性质 1066 Root of AVL Tree 构建AVL树,模板题,需理解记忆 1079 Total Sales of Supply Chain…

k-mer是指将reads分成包含k个碱基的字符串,一般长短为m的reads可以分成m-k+1个k-mers.举个例子吧,为了简化,有这么个reads(当然实际比这个长):AACTGACTGA.如果k-mer的k为3的话,我们可以将其切割为AAC ACT CTG TGA GAC ACT CTG TGA.我们将这些k-mers放入计算机中拼接,假设第一个为TGA ,那么下一个应该为GA-,.…… TGA GAC ACT CTG TG ???? 基于这样的思路,我们很快就发现了问题,下一个点可能有很…

一:知识点     数据结构:       1,单,双链表及循环链表       2,树的表示与存储,二叉树(概念,遍历)二叉树的                    应用(二叉排序树,判定树,博弈树,解答树等)       3,文件操作(从文本文件中读入数据并输出到文本文                 件中)       4,图(基本概念,存储结构,图的运算)    数学知识      1,离散数学知识的应用(如排列组合.简单的图论,数         理逻辑)      2,数论知识  …

Source: PAT (Advanced Level) Practice Reference: [1]胡凡,曾磊.算法笔记[M].机械工业出版社.2016.7 Outline: 基础数据结构: 线性表:栈,队列,链表,顺序表 树:二叉树的建立,二叉树的遍历,完全二叉树,二叉查找树,平衡二叉树,堆,哈夫曼树 图:图的存储和遍历 经典高级算法: 深度优先搜索,广度优点搜索,回溯剪枝 贪心,并查集,哈希映射 最短路径(只考察过单源),拓扑排序(18年9月第一次涉及相关概念,未正式考过),关键路径(未…

PAT(甲级)2017年春季考试 A.Raffle for Weibo Followers #include<bits/stdc++.h> using namespace std; int m,n,s; vector<string> person; set<string> se; vector<string> ans; int main(){ cin>>m>>n>>s; for(int i=1;i<=m;i++){…