考虑一个$N\times M$的网格,每个网格要么是空的,要么是障碍物.整个网格四周都是墙壁(即第$1$行和第$N$行,第$1$列和第$M$列都是墙壁),墙壁有且仅有两处开口,分别代表起点和终点.起点总是在网格左边,终点总是在网格右边.你只能朝$4$个方向移动:上下左右.数据保证从起点到终点至少有一条路径.从起点到终点可能有很多条路径,请找出有多少个网格是所有路径的必经网格. ——妙啊! 转换一下: 一个网格是必经网格 $\Rightarrow$它变成障碍物之后不能从起点走到终点 $\Right…

Sept. 10, 2015 Study again the back tracking algorithm using recursive solution, rat in maze, a classical problem. Made a few of mistakes through the practice, one is how to use two dimension array, another one is that "not all return path returns va…

http://www.lightoj.com/volume_showproblem.php?problem=1027 You are in a maze; seeing n doors in front of you in beginning. You can choose any door you like. The probability for choosing a door is equal for all doors. If you choose the ith door, it ca…

1204.   Maze Traversal A common problem in artificial intelligence is negotiation of a maze. A maze has corridors and walls. The robot can proceed along corridors, but cannot go through walls. Input For this problem, you will input the dimensions of…

/*这道题我原本是将斜线迷宫扩大为原来的两倍,但是在这种情况下对于在斜的方向上的搜索会变的较容易出错,所以参考了别人的思路后将迷宫扩展为原来的3倍,这样就变成一般的迷宫问题了*/ #include"iostream" #include"stdio.h" #include"algorithm" #include"cmath" #include"string.h" #include"ctype.h&q…

Zhuge Liang's Stone Sentinel Maze Time Limit: 10000/4000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 385    Accepted Submission(s): 106 Problem Description Zhuge Liang was a chancellor of the state of Shu Han dur…

Borg Maze Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9220   Accepted: 3087 Description The Borg is an immensely powerful race of enhanced humanoids from the delta quadrant of the galaxy. The Borg collective is the term used to descr…

Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9718   Accepted: 3263 Description The Borg is an immensely powerful race of enhanced humanoids from the delta quadrant of the galaxy. The Borg collective is the term used to describe the gr…

http://acm.split.hdu.edu.cn/showproblem.php?pid=4035 Maze Special Judge Problem Description   When wake up, lxhgww find himself in a huge maze. The maze consisted by N rooms and tunnels connecting these rooms. Each pair of rooms is connected by one a…

http://poj.org/problem?id=3026 Borg Maze Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12086   Accepted: 3953 Description The Borg is an immensely powerful race of enhanced humanoids from the delta quadrant of the galaxy. The Borg coll…