{"id":52894,"date":"2025-08-11T21:14:21","date_gmt":"2025-08-11T13:14:21","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/52894.html"},"modified":"2025-08-11T21:14:21","modified_gmt":"2025-08-11T13:14:21","slug":"%e6%b4%9b%e8%b0%b7-p1596-usaco10oct-lake-counting-s-%e6%99%ae%e5%8f%8a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/52894.html","title":{"rendered":"\u6d1b\u8c37 P1596 [USACO10OCT] Lake Counting S-\u666e\u53ca-"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h3>\n

\u7531\u4e8e\u6700\u8fd1\u7684\u964d\u96e8，\u6c34\u5728\u519c\u592b\u7ea6\u7ff0\u7684\u7530\u5730\u91cc\u79ef\u805a\u4e86\u3002\u7530\u5730\u53ef\u4ee5\u8868\u793a\u4e3a\u4e00\u4e2a N\u00d7MN \\\\times M<\/span><\/span>N<\/span><\/span>\u00d7<\/span><\/span><\/span><\/span>M<\/span><\/span><\/span><\/span><\/span> \u7684\u77e9\u5f62（1\u2264N\u22641001 \\\\leq N \\\\leq 100<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>N<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>100<\/span><\/span><\/span><\/span><\/span>；1\u2264M\u22641001 \\\\leq M \\\\leq 100<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>M<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>100<\/span><\/span><\/span><\/span><\/span>）\u3002\u6bcf\u4e2a\u65b9\u683c\u4e2d\u8981\u4e48\u662f\u6c34（W），\u8981\u4e48\u662f\u5e72\u5730（.）\u3002\u519c\u592b\u7ea6\u7ff0\u60f3\u8981\u5f04\u6e05\u695a\u4ed6\u7684\u7530\u5730\u91cc\u5f62\u6210\u4e86\u591a\u5c11\u4e2a\u6c34\u5858\u3002\u4e00\u4e2a\u6c34\u5858\u662f\u7531\u8fde\u901a\u7684\u6c34\u65b9\u683c\u7ec4\u6210\u7684，\u5176\u4e2d\u4e00\u4e2a\u65b9\u683c\u88ab\u8ba4\u4e3a\u4e0e\u5b83\u7684\u516b\u4e2a\u90bb\u5c45\u76f8\u90bb\u3002\u7ed9\u5b9a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u793a\u610f\u56fe，\u786e\u5b9a\u4ed6\u6709\u591a\u5c11\u4e2a\u6c34\u5858\u3002<\/p>\n

\u8f93\u5165\u683c\u5f0f<\/h3>\n

\u7b2c 11<\/span><\/span>1<\/span><\/span><\/span><\/span><\/span> \u884c：\u4e24\u4e2a\u7528\u7a7a\u683c\u5206\u9694\u7684\u6574\u6570：NN<\/span><\/span>N<\/span><\/span><\/span><\/span><\/span> \u548c MM<\/span><\/span>M<\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u7b2c 22<\/span><\/span>2<\/span><\/span><\/span><\/span><\/span> \u884c\u5230\u7b2c N+1N+1<\/span><\/span>N<\/span><\/span>+<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/span> \u884c：\u6bcf\u884c MM<\/span><\/span>M<\/span><\/span><\/span><\/span><\/span> \u4e2a\u5b57\u7b26，\u8868\u793a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u4e00\u884c\u3002<\/p>\n

\u6bcf\u4e2a\u5b57\u7b26\u8981\u4e48\u662f W，\u8981\u4e48\u662f .\u3002<\/p>\n

\u5b57\u7b26\u4e4b\u95f4\u6ca1\u6709\u7a7a\u683c\u3002<\/p>\n

\u8f93\u51fa\u683c\u5f0f<\/h3>\n

\u7b2c 11<\/span><\/span>1<\/span><\/span><\/span><\/span><\/span> \u884c：\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u4e2d\u7684\u6c34\u5858\u6570\u91cf\u3002<\/p>\n

\u8f93\u5165\u8f93\u51fa\u6837\u4f8b #1<\/h3>\n

\u8f93\u5165 #1<\/h4>\n

10 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.<\/p>\n

\u8f93\u51fa #1<\/h4>\n

3<\/p>\n

\u8bf4\u660e\/\u63d0\u793a<\/h3>\n

\u8f93\u51fa\u8be6\u60c5：\u5171\u6709\u4e09\u4e2a\u6c34\u5858：\u4e00\u4e2a\u5728\u5de6\u4e0a\u89d2，\u4e00\u4e2a\u5728\u5de6\u4e0b\u89d2，\u8fd8\u6709\u4e00\u4e2a\u6cbf\u7740\u53f3\u4fa7\u3002<\/p>\n

（\u7531 ChatGPT 4o \u7ffb\u8bd1）<\/p>\n

solution<\/h3>\n

\u601d\u8def：\u7528 dfs \u641c\u7d22 W \u4ee5\u53ca\u5468\u56f4\u56db\u4e2a\u65b9\u5411\u7684 W，\u72ec\u7acb\u641c\u7d22（\u5373\u4e0d\u662f\u4ece\u5176\u5b83W\u9012\u5f52\u641c\u7d22）\u6b21\u6570\u5c31\u662f\u6c34\u5858\u6c34\u91cf<\/p>\n

\u4ee3\u7801<\/h4>\n

#<\/span>include<\/span> <sstream><\/span><\/span>
\n#<\/span>include<\/span> "iostream"<\/span><\/span>
\n#<\/span>include<\/span> "math.h"<\/span><\/span>
\n#<\/span>include<\/span> "algorithm"<\/span><\/span>
\n#<\/span>include<\/span> "string.h"<\/span><\/span>
\n#<\/span>include<\/span> "unordered_set"<\/span><\/span>
\n#<\/span>include<\/span> "deque"<\/span><\/span>
\n#<\/span>include<\/span> "stack"<\/span><\/span>
\n#<\/span>include<\/span> "queue"<\/span><\/span>
\n#<\/span>include<\/span> "vector"<\/span><\/span>
\n#<\/span>include<\/span> "unordered_map"<\/span><\/span><\/p>\n

using<\/span> namespace<\/span> std;<\/span><\/p>\n

char<\/span> c[<\/span>100<\/span>]<\/span>[<\/span>100<\/span>]<\/span>;<\/span>
\nbool<\/span> vis[<\/span>100<\/span>]<\/span>[<\/span>100<\/span>]<\/span>;<\/span>
\nint<\/span> n,<\/span> m;<\/span><\/p>\n

int<\/span> dx[<\/span>8<\/span>]<\/span> =<\/span> {<\/span>–<\/span>1<\/span>,<\/span> –<\/span>1<\/span>,<\/span> –<\/span>1<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>}<\/span>;<\/span>
\nint<\/span> dy[<\/span>8<\/span>]<\/span> =<\/span> {<\/span>–<\/span>1<\/span>,<\/span> 0<\/span>,<\/span> 1<\/span>,<\/span> –<\/span>1<\/span>,<\/span> 1<\/span>,<\/span> –<\/span>1<\/span>,<\/span> 0<\/span>,<\/span> 1<\/span>}<\/span>;<\/span><\/p>\n

void<\/span> f<\/span>(<\/span>int<\/span> i,<\/span> int<\/span> j)<\/span> {<\/span>
\n vis[<\/span>i]<\/span>[<\/span>j]<\/span> =<\/span> 1<\/span>;<\/span>
\n for<\/span> (<\/span>int<\/span> k =<\/span> 0<\/span>;<\/span> k <<\/span> 8<\/span>;<\/span> k++<\/span>)<\/span> {<\/span>
\n if<\/span> (<\/span>i +<\/span> dx[<\/span>k]<\/span> >=<\/span> 0<\/span> &&<\/span> i +<\/span> dx[<\/span>k]<\/span> <<\/span> n &&<\/span> j +<\/span> dy[<\/span>k]<\/span> >=<\/span> 0<\/span> &&<\/span> j +<\/span> dy[<\/span>k]<\/span> <=<\/span> m &&<\/span> !<\/span>vis[<\/span>i +<\/span> dx[<\/span>k]<\/span>]<\/span>[<\/span>j +<\/span> dy[<\/span>k]<\/span>]<\/span> &&<\/span> c[<\/span>i +<\/span> dx[<\/span>k]<\/span>]<\/span>[<\/span>j +<\/span> dy[<\/span>k]<\/span>]<\/span> ==<\/span> 'W'<\/span>)<\/span> {<\/span>
\n f<\/span>(<\/span>i +<\/span> dx[<\/span>k]<\/span>,<\/span> j +<\/span> dy[<\/span>k]<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span> {<\/span>
\n cin >><\/span> n >><\/span> m;<\/span>
\n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> n;<\/span> i++<\/span>)<\/span> for<\/span> (<\/span>int<\/span> j =<\/span> 0<\/span>;<\/span> j <<\/span> m;<\/span> j++<\/span>)<\/span> cin >><\/span> c[<\/span>i]<\/span>[<\/span>j]<\/span>;<\/span><\/p>\n

int<\/span> s =<\/span> 0<\/span>;<\/span>
\n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> n;<\/span> i++<\/span>)<\/span>
\n for<\/span> (<\/span>int<\/span> j =<\/span> 0<\/span>;<\/span> j <<\/span> m;<\/span> j++<\/span>)<\/span>
\n if<\/span> (<\/span>!<\/span>vis[<\/span>i]<\/span>[<\/span>j]<\/span> &&<\/span> c[<\/span>i]<\/span>[<\/span>j]<\/span> ==<\/span> 'W'<\/span>)<\/span> {<\/span>
\n s++<\/span>;<\/span>
\n f<\/span>(<\/span>i,<\/span> j)<\/span>;<\/span>
\n }<\/span><\/p>\n

cout <<<\/span> s;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ed3\u679c<\/h4>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb200\u6b21\u3002\u519c\u592b\u7ea6\u7ff0\u60f3\u8981\u5f04\u6e05\u695a\u4ed6\u7684\u7530\u5730\u91cc\u5f62\u6210\u4e86\u591a\u5c11\u4e2a\u6c34\u5858\u3002\u4e00\u4e2a\u6c34\u5858\u662f\u7531\u8fde\u901a\u7684\u6c34\u65b9\u683c\u7ec4\u6210\u7684\uff0c\u5176\u4e2d\u4e00\u4e2a\u65b9\u683c\u88ab\u8ba4\u4e3a\u4e0e\u5b83\u7684\u516b\u4e2a\u90bb\u5c45\u76f8\u90bb\u3002\u7ed9\u5b9a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u793a\u610f\u56fe\uff0c\u786e\u5b9a\u4ed6\u6709\u591a\u5c11\u4e2a\u6c34\u5858\u3002\u601d\u8def\uff1a\u7528 dfs \u641c\u7d22 W \u4ee5\u53ca\u5468\u56f4\u56db\u4e2a\u65b9\u5411\u7684 W\uff0c\u72ec\u7acb\u641c\u7d22\uff08\u5373\u4e0d\u662f\u4ece\u5176\u5b83W\u9012\u5f52\u641c\u7d22\uff09\u6b21\u6570\u5c31\u662f\u6c34\u5858\u6c34\u91cf\u3002\u8f93\u51fa\u8be6\u60c5\uff1a\u5171\u6709\u4e09\u4e2a\u6c34\u5858\uff1a\u4e00\u4e2a\u5728\u5de6\u4e0a\u89d2\uff0c\u4e00\u4e2a\u5728\u5de6\u4e0b\u89d2\uff0c\u8fd8\u6709\u4e00\u4e2a\u6cbf\u7740\u53f3\u4fa7\u3002\u7531\u4e8e\u6700\u8fd1\u7684\u964d\u96e8\uff0c\u6c34\u5728\u519c\u592b\u7ea6\u7ff0\u7684\u7530\u5730\u91cc\u79ef\u805a\u4e86\u3002\u4e2a\u5b57\u7b26\uff0c\u8868\u793a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u4e00\u884c\u3002\uff08\u7531 ChatGPT 4o \u7ffb\u8bd1\uff09\u884c\uff1a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u4e2d\u7684\u6c34\u5858\u6570\u91cf\u3002\u6bcf\u4e2a\u65b9\u683c\u4e2d\u8981\u4e48\u662f\u6c34\uff08<\/p>\n","protected":false},"author":2,"featured_media":52893,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,1813,3784,427],"topic":[],"class_list":["post-52894","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-1813","tag-3784","tag-427"],"yoast_head":"\n\u6d1b\u8c37 P1596 [USACO10OCT] Lake Counting S-\u666e\u53ca- \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/52894.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6d1b\u8c37 P1596 [USACO10OCT] Lake Counting S-\u666e\u53ca- \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb200\u6b21\u3002\u519c\u592b\u7ea6\u7ff0\u60f3\u8981\u5f04\u6e05\u695a\u4ed6\u7684\u7530\u5730\u91cc\u5f62\u6210\u4e86\u591a\u5c11\u4e2a\u6c34\u5858\u3002\u4e00\u4e2a\u6c34\u5858\u662f\u7531\u8fde\u901a\u7684\u6c34\u65b9\u683c\u7ec4\u6210\u7684\uff0c\u5176\u4e2d\u4e00\u4e2a\u65b9\u683c\u88ab\u8ba4\u4e3a\u4e0e\u5b83\u7684\u516b\u4e2a\u90bb\u5c45\u76f8\u90bb\u3002\u7ed9\u5b9a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u793a\u610f\u56fe\uff0c\u786e\u5b9a\u4ed6\u6709\u591a\u5c11\u4e2a\u6c34\u5858\u3002\u601d\u8def\uff1a\u7528 dfs \u641c\u7d22 W \u4ee5\u53ca\u5468\u56f4\u56db\u4e2a\u65b9\u5411\u7684 W\uff0c\u72ec\u7acb\u641c\u7d22\uff08\u5373\u4e0d\u662f\u4ece\u5176\u5b83W\u9012\u5f52\u641c\u7d22\uff09\u6b21\u6570\u5c31\u662f\u6c34\u5858\u6c34\u91cf\u3002\u8f93\u51fa\u8be6\u60c5\uff1a\u5171\u6709\u4e09\u4e2a\u6c34\u5858\uff1a\u4e00\u4e2a\u5728\u5de6\u4e0a\u89d2\uff0c\u4e00\u4e2a\u5728\u5de6\u4e0b\u89d2\uff0c\u8fd8\u6709\u4e00\u4e2a\u6cbf\u7740\u53f3\u4fa7\u3002\u7531\u4e8e\u6700\u8fd1\u7684\u964d\u96e8\uff0c\u6c34\u5728\u519c\u592b\u7ea6\u7ff0\u7684\u7530\u5730\u91cc\u79ef\u805a\u4e86\u3002\u4e2a\u5b57\u7b26\uff0c\u8868\u793a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u7684\u4e00\u884c\u3002\uff08\u7531 ChatGPT 4o \u7ffb\u8bd1\uff09\u884c\uff1a\u519c\u592b\u7ea6\u7ff0\u7530\u5730\u4e2d\u7684\u6c34\u5858\u6570\u91cf\u3002\u6bcf\u4e2a\u65b9\u683c\u4e2d\u8981\u4e48\u662f\u6c34\uff08\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/52894.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta 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