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…
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…
[POJ 2942]Knights of the Round Table(双联通分量+染色判奇环) Time Limit: 7000MS Memory Limit: 65536K Total Submissions: 11661 Accepted: 3824 Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, an…
[POJ 2195] Going Home(KM算法求最小权匹配) Going Home Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 20303 Accepted: 10297 Description On a grid map there are n little men and n houses. In each unit time, every little man can move one unit ste…
