哈密顿绕行世界问题 HDOJ-2181 1.本题是典型的搜索记录路径的问题 2.主要使用的方法是dfs深搜,在输入的时候对vector进行排序,这样才能按照字典序输出. 3.为了记录路径,我使用的是两个vector,每次找到结果时,将一个vector赋值给另一个,再去输出.在dfs遍历顶点vector的时候,先push_back一个要搜的点,递归回来以后再pop_back 4.本题注意输出的格式 #include<iostream> #include<cstdio> #includ…

地道战是在抗日战争时期,在华北平原上抗日军民利用地道打击日本侵略者的作战方式.地道网是房连房.街连街.村连村的地下工事,如下图所示. 我们在回顾前辈们艰苦卓绝的战争生活的同时,真心钦佩他们的聪明才智.在现在和平发展的年代,对多数人来说,探索地下通道或许只是一种娱乐或者益智的游戏.本实验案例以探索地下通道迷宫作为内容. 假设有一个地下通道迷宫,它的通道都是直的,而通道所有交叉点(包括通道的端点)上都有一盏灯和一个开关.请问你如何从某个起点开始在迷宫中点亮所有的灯并回到起点? 输入格式: 输入第一行…

主要是学一下如何在广搜中记录路径:每找到一个点我就记录下这个点是由那个点得来的,这样我找到最后个点后,我就可以通过回溯得到我走过的路径,具体看代码吧~ #include<cstdio> #include<stdio.h> #include<cstdlib> #include<cmath> #include<iostream> #include<algorithm> #include<cstring> #include<…

Problem Description Angel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <= 200) matrix. There are WALLs, ROADs, and GUARDs in the prison. Angel's friends want to save Angel. Their task is: approa…

Problem Description === Op tech briefing, 2002/11/02 06:42 CST === "The item is locked in a Klein safe behind a painting in the second-floor library. Klein safes are extremely rare; most of them, along with Klein and his factory, were destroyed in Wo…

Description You are given two pots, having the volume of A and B liters respectively. The following operations can be performed: FILL(i)        fill the pot i (1 ≤ i ≤ 2) from the tap; DROP(i)      empty the pot i to the drain; POUR(i,j)    pour from…

最短路记录路径,同一时候求出最短的路径上最少要有多少条边, 然后用在最短路上的边又一次构图后求最小割. Tricks Device Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1584    Accepted Submission(s): 388 Problem Description Innocent Wu follows Dum…

需要处理好字典序最小的路径 HDU1385(ZOJ1456)-Minimum Transport //Hdu1385-ZOJ1456 //给定邻接矩阵,求给定起点到终点的最短路径,若有相同路长的路径按照字典序输出 //Floyd比较适合此题 //网上看到的两种做法比较推荐 //第一种是Floyd+记录起点后继 //第二种是Floyd+深搜(从起点开始深搜至终点)-利用Floyd得到的最短路剪枝 //其他的解法则是按照SPFA,dijkstra解,当路长相同时需要进行比较(较繁琐) //Time:…

Curling 2.0 Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other) Total Submission(s) : 30   Accepted Submission(s) : 16 Problem Description On Planet MM-21, after their Olympic games this year, curling is getting popular.…

Description An abandoned country has n(n≤100000) villages which are numbered from 1 to n. Since abandoned for a long time, the roads need to be re-built. There are m(m≤1000000) roads to be re-built, the length of each road is wi(wi≤1000000). Guarante…