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…
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…
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…
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…
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7661 Accepted Submission(s): 4567 Problem Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to…
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…