题目链接 首先bfs, 求出两两之间的距离, 然后dfs就可以. #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> #include <string> #include <queue> #include <vector> #include <map> #incl…

题意: 给你一个n*m的图.你从'o'点出发,只能走路(图中的'.')不能穿墙(图中的'x'),去捡垃圾(图中的' * ')问最少走多少步能捡完所有垃圾,如有垃圾捡不了,输出-1. 思路: 有两个思路 我会的 我不会的 (嗯 学一下小杰) 我会的-->BFS+全排列(next_permutation可水之) 我不会的–>BFS+状压DP //By: Sirius_Ren #include <queue> #include <cstdio> #include <cs…

POJ 2376 Cleaning Shifts(轮班打扫) Time Limit: 1000MS   Memory Limit: 65536K [Description] [题目描述] Farmer John is assigning some of his N (1 <= N <= 25,000) cows to do some cleaning chores around the barn. He always wants to have one cow working on clean…

题意: 裸的tsp. 分析: 用bfs求出随意两点之间的距离后能够暴搜也能够用next_permutation水,但效率肯定不如状压dp.dp[s][u]表示从0出发訪问过s集合中的点.眼下在点u走过的最短路程. 代码: //poj 2688 //sep9 #include <iostream> #include <queue> using namespace std; const int maxW=32; const int maxN=12; int dx[4]={-1,1,0,…

Cleaning Robot Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 4264 Accepted: 1713 Description Here, we want to solve path planning for a mobile robot cleaning a rectangular room floor with furniture. Consider the room floor paved with squ…

Cleaning Robot (bfs+dfs) Here, we want to solve path planning for a mobile robot cleaning a rectangular room floor with furniture. Consider the room floor paved with square tiles whose size fits the cleaning robot (1 * 1). There are 'clean tiles' and…

题目链接:https://vjudge.net/problem/POJ-2688 题意:在一个地面上,有一个扫地机器人,有一些障碍物,有一些脏的地砖,问,机器热能不能清扫所有的地砖, (机器人不能越过障碍物),如果能,需要得到机器人移动最少步数. 思路:可以把扫地机器人和地砖编号,然后得出编号之间的相互距离,那么就变成了一个图问题. 用bfs来得出编号之间的距离. 再用dfs来填边,得到最少移动步数,注意要剪支,不然就T了... #include <iostream> #include <…

http://poj.org/problem?id=2376 Cleaning Shifts Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12604   Accepted: 3263 Description Farmer John is assigning some of his N (1 <= N <= 25,000) cows to do some cleaning chores around the barn.…

Cleaning Shifts 题目连接: http://poj.org/problem?id=2376 Description Farmer John is assigning some of his N (1 <= N <= 25,000) cows to do some cleaning chores around the barn. He always wants to have one cow working on cleaning things up and has divided…

题目地址: http://poj.org/problem?id=2376 题目内容: Cleaning Shifts Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12226   Accepted: 3187 Description Farmer John is assigning some of his N (1 <= N <= 25,000) cows to do some cleaning chores arou…