测-哨兵的自动寻路
题目描述
背景
哨兵需要在RM的赛场上自主移动，由于赛场上时间一点都不能浪费，因此找到赛场上两点之间的一条最短一条路径成了哨兵路径规划的一个重要问题。
题目
利用字符串给出一个正方形迷宫，代表场地。假设哨兵目前在迷宫的左上角，现在需要前往迷宫的右下角，请你给出这两点间的最短曼哈顿距离。
输入格式
第1行为一个整数n，代表迷宫的边长
第2至2n+2行为这个迷宫的具体图案
一个边长为n的迷宫在用字符串表示时，每行会有4n+1个字符，'#'与' '相互交替，而每奇数列则有2n+1个字符'#'。
哨兵的起点在这个迷宫的第二行第三列，终点在这个迷宫的倒数第二行倒数第三列。
距离的定义为：横向每间隔3个字符为一个单位距离，纵向每间隔1个字符为一个单位距离。
n<=100
输出格式
一个整数s，代表迷宫左上角和右下角的距离。
10
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102
提示
无