{"trustable":false,"sections":[{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e10 12\nW........WW.\n.WWW.....WWW\n....WW...WW.\n.........WW.\n.........W..\n..W......W..\n.W.W.....WW.\nW.W.W.....W.\n.W.W......W.\n..W.......W.\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e3\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 样例解释:\n \u003cbr\u003e \n \u003cbr\u003e左下方,左上方,右边三块\n \u003c/div\u003e"}}]}