A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks that the most difficult…

简单搜索,我这里用的是dfs,由于棋盘只有8x8这么大,于是想到dfs应该可以过,后来由于边界的问题,TLE了,改了边界才AC. 这道题的收获就是知道了有些时候dfs没有特定的边界的时候要自己设置一个合适的边界.这题推导可知,任意两点之间马踩6步之内一定能够到达,6步之内还未搜到说明绝对不是最优结果,果断退出.所以这里的res开始时最小设定为6即可,随着设的res的增大,运行时间越来越多,因为深搜可以有很多的分支,不采取较小的边界的话,可能会浪费很多时间在无用的搜索上,所以需要如此剪枝. 反复提…

题目 题目     分析 没有估价函数的IDA......     代码 #include <cstdio> #include <cstring> #include <algorithm> using namespace std; int q,dx[10]={2,2,-2,-2,1,-1,1,-1},dy[10]={1,-1,1,-1,2,2,-2,-2},ans=1<<15; bool vis[11][11]; int x1,y1,x2,y2; bool…

Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 10542    Accepted Submission(s): 6211 Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) wh…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1372 Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10372    Accepted Submission(s): 6105 Problem Description A friend of you is doin…

题 Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks that the…

这道题实到bfs的题目,很简单,不过搜索的方向变成8个而已,对于不会下象棋的会有点晕. #include <iostream> #include <stdio.h> #include <string.h> #include <queue> using namespace std; ][]; ][] = {{-,-},{-,},{-,},{,},{,},{,-},{,-},{-,-}}; typedef struct { int x,y,count; }nod…

1.链接地址: http://bailian.openjudge.cn/practice/1915 http://poj.org/problem?id=1915 2.题目: 总Time Limit: 1000ms Memory Limit: 65536kB Description BackgroundMr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him can move knights from o…

Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks tha…

Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks tha…

HDU1372:Knight Moves(BFS)   Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu   Description   A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves…

题目链接:http://poj.org/problem?id=2243 启发式搜索:启发式搜索就是在状态空间中的搜索对每一个搜索的位置进行评估,得到最好的位置,再从这个位置进行搜索直到目标.这样可以省略大量无畏的搜索路径,提到了效率.在启发式搜索中,对位置的估价是十分重要的.采用了不同的估价可以有不同的效果. 估价函数:从当前节点移动到目标节点的预估费用:这个估计就是启发式的.在寻路问题和迷宫问题中,我们通常用曼哈顿(manhattan)估价函数(下文有介绍)预估费用. A*算法与BFS:可以这…

题目: A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks that the most diffi…

Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He thinks tha…

题目链接:http://noi.openjudge.cn/ch0205/917/ 原题应该是hdu 1372 总时间限制: 1000ms  内存限制: 65536kB 描述 BackgroundMr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him can move knights from one position to another so fast. Can you beat him?The P…

http://acm.hdu.edu.cn/showproblem.php?pid=1372 Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6731    Accepted Submission(s): 4059 Problem Description A friend of you is doing res…

题目链接 http://poj.org/problem?id=2243 题意 输入8*8国际象棋棋盘上的两颗棋子(a~h表示列,1~8表示行),求马从一颗棋子跳到另一颗棋子需要的最短路径. 思路 使用bfs求解,注意国际象棋中马的走法. 代码 #include <iostream> #include <cstring> #include <cstdio> #include <string> #include <queue> using names…

题目链接 Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares on a chessboard exactly once. He think…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=1372 Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13384    Accepted Submission(s): 7831 Problem Description A friend of you is doin…

题目链接:http://poj.org/problem?id=2243 Knight Moves Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 14500   Accepted: 8108 Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortes…

这道题曾经写过,bfs.用队列,不多说了,上代码: #include<stdio.h> #include<stdlib.h> #include<string.h> #include<queue> using namespace std; int map[10][10]; int visit[10][10]; int dist[10][10]; int dx[8]={-2,-2,-1,-1,1,1,2,2}; int dy[8]={-1,1,-2,2,-2,2…

[链接] 我是链接,点我呀:) [题意] 在这里输入题意 [题解] bfs模板题 [代码] /* 1.Shoud it use long long ? 2.Have you ever test several sample(at least therr) yourself? 3.Can you promise that the solution is right? At least,the main ideal 4.use the puts("") or putchar() or pr…

#include<bits/stdc++.h> using namespace std; char a,c; int b,d; ][]; ]={,,,-,,-,-,-}; ]={,-,,,-,-,,-}; int main(){ while(cin>>a>>b>>c>>d){ memset(mp,-,sizeof(mp)); ,num=; mp[a-][b]=; ){ ;i<=;++i){ ;j<=;++j){ if(mp[i][j]…

Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 14125    Accepted Submission(s): 8269 Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) whe…

#include<iostream> #include<queue> #include<cstring> #include<string> #include<cstdio> using namespace std; struct Point { int x_, y_; int route; }; int dic[8][2] = {-1,2 ,1,2 ,2,1 ,2,-1 ,1,-2 ,-1,-2 ,-2,-1 ,-2,1}; int vis[10…

题目描述 Mr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him can move knights from one position to another so fast. Can you beat him? Your task is to write a program to calculate the minimum number of moves needed for a knight to…

1450:[例 3]Knight Moves  题解 这道题可以用双向宽度搜索优化(总介绍在  BFS ) 给定了起始状态和结束状态,求最少步数,显然是用BFS,为了节省时间,选择双向BFS. 双向BFS,即从起点向终点搜,从终点向起点搜,扩展各自的状态,直到出现两者扩展的状态重合 优化:每次选择结点少的扩展 看一下骑士可以到达那些点呢?? 所以当然要开两个队列啦 设定: 1. dis[ i ][ a ][ b ]:队列 i ,从起点(a,b)至少多少步 2.    v[ i ][ a ][ b…

跳马(Knight Moves), ZOJ1091, POJ2243 题目描述: 给定象棋棋盘上两个位置 a 和 b,编写程序,计算马从位置 a 跳到位置 b 所需步数的最小值. 输入描述: 输入文件包含多个测试数据.每个测试数据占一行,为棋盘中的两个位置,用空格隔开.棋盘位置为两个字符组成的串,第 1 个字符为字母 a-h,代表棋盘中的列:第 2 个字符为数字字符1-8,代表棋盘中的行. 输出描述: 对输入文件中的每个测试数据,输出一行"To get from xx to yy takes n…

# 10028. 「一本通 1.4 例 3」Knight Moves [题目描述] 编写一个程序,计算一个骑士从棋盘上的一个格子到另一个格子所需的最小步数.骑士一步可以移动到的位置由下图给出. [算法] 双向bfs优先扩展节点数少的队列.什么破东西速度没快多少啊.... [代码] #include <stdio.h> #include <queue> #define P pair<int,int> #define ff first #define ss second u…

Knight Moves Time Limit: 2 Seconds      Memory Limit: 65536 KB A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square of a given set of n squares…