{"trustable":false,"sections":[{"title":"Description - 题目描述","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 有个铺满方形瓷砖的矩形房间,每块瓷砖的颜色非红即黑。某人在一块砖上,他可以移动到相邻的四块砖上。但他只能走黑砖,不能走红砖。\n \u003cbr\u003e \n \u003cbr\u003e敲个程序统计一下这样可以走到几块红砖上。\n \u003cbr\u003e\n \u003c/div\u003e"}},{"title":"Input - 输入","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 多组测试用例。每组数组开头有两个正整数W和H;W与H分别表示 x- 与 y- 方向上瓷砖的数量。W和W均不超过20。\n \u003cbr\u003e \n \u003cbr\u003e还有H行数据,每行包含W个字符。每个字符表示各色瓷砖如下。\n \u003cbr\u003e \n \u003cbr\u003e\u0027.\u0027 - 一块黑砖 \n \u003cbr\u003e\u0027#\u0027 - 一块红砖 \n \u003cbr\u003e\u0027@\u0027 - 一个黑砖上的人(一组数据一个人)\n \u003cbr\u003e输入以一行两个零为结束。\n \u003cbr\u003e\n \u003c/div\u003e"}},{"title":"Output - 输出","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 对于每组测试用例,输出他从起始砖出发所能抵达的瓷砖数量(包括起始砖)。\n \u003c/div\u003e"}},{"title":"Sample Input - 输入样例","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e6 9\n....#.\n.....#\n......\n......\n......\n......\n......\n#@...#\n.#..#.\n11 9\n.#.........\n.#.#######.\n.#.#.....#.\n.#.#.###.#.\n.#.#..@#.#.\n.#.#####.#.\n.#.......#.\n.#########.\n...........\n11 6\n..#..#..#..\n..#..#..#..\n..#..#..###\n..#..#..#@.\n..#..#..#..\n..#..#..#..\n7 7\n..#.#..\n..#.#..\n###.###\n...@...\n###.###\n..#.#..\n..#.#..\n0 0\u003c/pre\u003e"}},{"title":"Sample Output - 输出样例","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e45\n59\n6\n13\n\u003c/pre\u003e"}}]}