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punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> grid<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> j<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rows <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cols <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">||<\/span> i <span class=\"token operator\">&gt;&#061;<\/span> rows <span class=\"token operator\">||<\/span> j <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">||<\/span> j <span class=\"token operator\">&gt;&#061;<\/span> cols <span class=\"token operator\">||<\/span> grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6807\u8bb0\u8bbf\u95ee\u8fc7<\/span><br \/>\n        <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u590d\u6742\u5ea6\u5206\u6790<\/h4>\n<table>\n<tr>\u7c7b\u522b\u590d\u6742\u5ea6<\/tr>\n<tbody>\n<tr>\n<td>\u65f6\u95f4\u590d\u6742\u5ea6<\/td>\n<td>O(m \u00d7 n) \u2014 \u6bcf\u4e2a\u683c\u5b50\u53ea\u4f1a\u88ab\u8bbf\u95ee\u4e00\u6b21<\/td>\n<\/tr>\n<tr>\n<td>\u7a7a\u95f4\u590d\u6742\u5ea6<\/td>\n<td>O(m \u00d7 n) \u2014 \u9012\u5f52\u6808\u6df1\u5ea6\u6700\u5927\u4e3a\u7f51\u683c\u5927\u5c0f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e94\u3001\u65b9\u6cd5\u4e8c&#xff1a;\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22&#xff08;BFS&#xff09;<\/h3>\n<h4>\u89e3\u9898\u601d\u8def<\/h4>\n<ul>\n<li>\u4e0e DFS \u7c7b\u4f3c&#xff0c;\u53ea\u662f\u4f7f\u7528\u961f\u5217\u4ee3\u66ff\u6808&#xff1b;<\/li>\n<li>\u6bcf\u5f53\u53d1\u73b0\u65b0\u7684\u9646\u5730&#xff0c;\u5c06\u5176\u5165\u961f&#xff1b;<\/li>\n<li>\u4e0d\u65ad\u6269\u5c55\u76f8\u90bb\u8282\u70b9&#xff0c;\u5b8c\u6210\u4e00\u6574\u4e2a\u5c9b\u5c7f\u7684\u904d\u5386\u3002<\/li>\n<\/ul>\n<h4>BFS \u65f6\u5e8f\u56fe<\/h4>\n<p>      Algorithm <\/p>\n<p>      Queue <\/p>\n<p>      Grid <\/p>\n<p>       Algorithm <\/p>\n<p>       Queue <\/p>\n<p>       Grid <\/p>\n<p>  #mermaid-svg-9Cqkc6uyFbWbcGpP{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-9Cqkc6uyFbWbcGpP .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-9Cqkc6uyFbWbcGpP .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-9Cqkc6uyFbWbcGpP .error-icon{fill:#552222;}#mermaid-svg-9Cqkc6uyFbWbcGpP .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-9Cqkc6uyFbWbcGpP .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-9Cqkc6uyFbWbcGpP 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.innerArc{stroke-width:1.5;stroke-dasharray:none;}#mermaid-svg-9Cqkc6uyFbWbcGpP .messageLine0{stroke-width:1.5;stroke-dasharray:none;stroke:#333;}#mermaid-svg-9Cqkc6uyFbWbcGpP .messageLine1{stroke-width:1.5;stroke-dasharray:2,2;stroke:#333;}#mermaid-svg-9Cqkc6uyFbWbcGpP #arrowhead path{fill:#333;stroke:#333;}#mermaid-svg-9Cqkc6uyFbWbcGpP .sequenceNumber{fill:white;}#mermaid-svg-9Cqkc6uyFbWbcGpP #sequencenumber{fill:#333;}#mermaid-svg-9Cqkc6uyFbWbcGpP #crosshead path{fill:#333;stroke:#333;}#mermaid-svg-9Cqkc6uyFbWbcGpP .messageText{fill:#333;stroke:none;}#mermaid-svg-9Cqkc6uyFbWbcGpP .labelBox{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-9Cqkc6uyFbWbcGpP .labelText,#mermaid-svg-9Cqkc6uyFbWbcGpP .labelText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-9Cqkc6uyFbWbcGpP .loopText,#mermaid-svg-9Cqkc6uyFbWbcGpP .loopText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-9Cqkc6uyFbWbcGpP .loopLine{stroke-width:2px;stroke-dasharray:2,2;stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);}#mermaid-svg-9Cqkc6uyFbWbcGpP .note{stroke:#aaaa33;fill:#fff5ad;}#mermaid-svg-9Cqkc6uyFbWbcGpP .noteText,#mermaid-svg-9Cqkc6uyFbWbcGpP .noteText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-9Cqkc6uyFbWbcGpP .activation0{fill:#f4f4f4;stroke:#666;}#mermaid-svg-9Cqkc6uyFbWbcGpP .activation1{fill:#f4f4f4;stroke:#666;}#mermaid-svg-9Cqkc6uyFbWbcGpP .activation2{fill:#f4f4f4;stroke:#666;}#mermaid-svg-9Cqkc6uyFbWbcGpP .actorPopupMenu{position:absolute;}#mermaid-svg-9Cqkc6uyFbWbcGpP .actorPopupMenuPanel{position:absolute;fill:#ECECFF;box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);filter:drop-shadow(3px 5px 2px rgb(0 0 0 \/ 0.4));}#mermaid-svg-9Cqkc6uyFbWbcGpP .actor-man line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-9Cqkc6uyFbWbcGpP .actor-man circle,#mermaid-svg-9Cqkc6uyFbWbcGpP line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;stroke-width:2px;}#mermaid-svg-9Cqkc6uyFbWbcGpP :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;} <\/p>\n<p>     loop <\/p>\n<p>      [\u6bcf\u4e2a\u961f\u5217\u5143\u7d20] <\/p>\n<p>    \u904d\u5386\u53d1\u73b0\u20181\u2019 <\/p>\n<p>    \u52a0\u5165\u961f\u5217 <\/p>\n<p>    \u53d6\u51fa\u5f53\u524d\u8282\u70b9 <\/p>\n<p>    \u6807\u8bb0\u4e3a\u20180\u2019 <\/p>\n<p>    \u52a0\u5165\u76f8\u90bb\u9646\u5730 <\/p>\n<p>    \u5b8c\u6210\u4e00\u4e2a\u5c9b\u5c7f\u6269\u5c55 <\/p>\n<h4>Java\u4ee3\u7801\u5b9e\u73b0<\/h4>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Solution<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">numIslands<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> grid<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rows <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>rows <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cols <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> rows<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> cols<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    count<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">bfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">bfs<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> grid<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rows <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cols <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Queue<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&gt;<\/span> queue <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">LinkedList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        grid<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>y<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> dirs <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> cur <span class=\"token operator\">&#061;<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> d <span class=\"token operator\">:<\/span> dirs<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">int<\/span> nx <span class=\"token operator\">&#061;<\/span> cur<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> d<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">int<\/span> ny <span class=\"token operator\">&#061;<\/span> cur<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> d<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>nx <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> nx <span class=\"token operator\">&lt;<\/span> rows <span class=\"token operator\">&amp;&amp;<\/span> ny <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> ny <span class=\"token operator\">&lt;<\/span> cols <span class=\"token operator\">&amp;&amp;<\/span> grid<span class=\"token punctuation\">[<\/span>nx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>ny<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    grid<span class=\"token punctuation\">[<\/span>nx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>ny<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span>nx<span class=\"token punctuation\">,<\/span> ny<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u590d\u6742\u5ea6\u5206\u6790<\/h4>\n<table>\n<tr>\u7c7b\u522b\u590d\u6742\u5ea6<\/tr>\n<tbody>\n<tr>\n<td>\u65f6\u95f4\u590d\u6742\u5ea6<\/td>\n<td>O(m \u00d7 n)<\/td>\n<\/tr>\n<tr>\n<td>\u7a7a\u95f4\u590d\u6742\u5ea6<\/td>\n<td>O(min(m, n)) \u2014 \u961f\u5217\u6700\u5927\u957f\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u516d\u3001\u65b9\u6cd5\u4e09&#xff1a;\u5e76\u67e5\u96c6&#xff08;Union-Find&#xff09;<\/h3>\n<h4>\u89e3\u9898\u539f\u7406<\/h4>\n<ul>\n<li>\u5c06\u6bcf\u4e2a\u9646\u5730\u683c\u5b50\u770b\u4f5c\u4e00\u4e2a\u8282\u70b9&#xff1b;<\/li>\n<li>\u82e5\u76f8\u90bb\u4e24\u683c\u90fd\u662f &#039;1&#039;&#xff0c;\u5219\u8fdb\u884c \u201c\u5408\u5e76\u201d \u64cd\u4f5c&#xff1b;<\/li>\n<li>\u6700\u540e\u7edf\u8ba1\u6709\u591a\u5c11\u4e2a\u4e0d\u540c\u7684\u96c6\u5408&#xff08;\u6839\u8282\u70b9\u6570\u91cf&#xff09;&#xff0c;\u5373\u5c9b\u5c7f\u6570\u91cf\u3002<\/li>\n<\/ul>\n<h4>\u5e76\u67e5\u96c6\u6d41\u7a0b\u56fe<\/h4>\n<p>  #mermaid-svg-f7UyXpk7mNanGJfK{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-f7UyXpk7mNanGJfK .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear 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0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-f7UyXpk7mNanGJfK .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-f7UyXpk7mNanGJfK .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-f7UyXpk7mNanGJfK .cluster text{fill:#333;}#mermaid-svg-f7UyXpk7mNanGJfK .cluster span{color:#333;}#mermaid-svg-f7UyXpk7mNanGJfK div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-f7UyXpk7mNanGJfK .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-f7UyXpk7mNanGJfK rect.text{fill:none;stroke-width:0;}#mermaid-svg-f7UyXpk7mNanGJfK .icon-shape,#mermaid-svg-f7UyXpk7mNanGJfK .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-f7UyXpk7mNanGJfK .icon-shape p,#mermaid-svg-f7UyXpk7mNanGJfK .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-f7UyXpk7mNanGJfK .icon-shape rect,#mermaid-svg-f7UyXpk7mNanGJfK .image-shape rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-f7UyXpk7mNanGJfK .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-f7UyXpk7mNanGJfK .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-f7UyXpk7mNanGJfK :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;} <\/p>\n<p>         <span class=\"edgeLabel\"><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u5426<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/p>\n<p>\u662f<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/span> <\/p>\n<p>         <span class=\"edgeLabel\"><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u521d\u59cb\u5316\u5e76\u67e5\u96c6\u7ed3\u6784<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u904d\u5386grid<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5f53\u524d\u683c\u5b50\u4e3a1?<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u8df3\u8fc7<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u68c0\u67e5\u4e0a\u4e0b\u5de6\u53f3\u76f8\u90bb\u8282\u70b9<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u5408\u5e76\u76f8\u90bb\u9646\u5730\u8282\u70b9<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u66f4\u65b0\u96c6\u5408\u6570\u91cf<\/p>\n<p><\/span> <\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>\u8fd4\u56de\u5c9b\u5c7f\u6570\u91cf<\/p>\n<p><\/span> <\/p>\n<h4>Java\u4ee3\u7801\u5b9e\u73b0<\/h4>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Solution<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">numIslands<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> grid<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rows <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> cols <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">UnionFind<\/span> uf <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">UnionFind<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> dirs <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> rows<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> cols<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> d <span class=\"token operator\">:<\/span> dirs<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token keyword\">int<\/span> nx <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">&#043;<\/span> d<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token keyword\">int<\/span> ny <span class=\"token operator\">&#061;<\/span> j <span class=\"token operator\">&#043;<\/span> d<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>nx <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> nx <span class=\"token operator\">&lt;<\/span> rows <span class=\"token operator\">&amp;&amp;<\/span> ny <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> ny <span class=\"token operator\">&lt;<\/span> cols <span class=\"token operator\">&amp;&amp;<\/span> grid<span class=\"token punctuation\">[<\/span>nx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>ny<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                            uf<span class=\"token punctuation\">.<\/span><span class=\"token function\">union<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">*<\/span> cols <span class=\"token operator\">&#043;<\/span> j<span class=\"token punctuation\">,<\/span> nx <span class=\"token operator\">*<\/span> cols <span class=\"token operator\">&#043;<\/span> ny<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                        <span class=\"token punctuation\">}<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> uf<span class=\"token punctuation\">.<\/span><span class=\"token function\">getCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">UnionFind<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> parent<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> rows<span class=\"token punctuation\">,<\/span> cols<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">UnionFind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> grid<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        rows <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        cols <span class=\"token operator\">&#061;<\/span> grid<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span><br \/>\n        parent <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span>rows <span class=\"token operator\">*<\/span> cols<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> rows<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> cols<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">int<\/span> id <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">*<\/span> cols <span class=\"token operator\">&#043;<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\n                    parent<span class=\"token punctuation\">[<\/span>id<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> id<span class=\"token punctuation\">;<\/span><br \/>\n                    count<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>parent<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> x<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            parent<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>parent<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> parent<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">union<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rootX <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> rootY <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>rootX <span class=\"token operator\">!&#061;<\/span> rootY<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            parent<span class=\"token punctuation\">[<\/span>rootX<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> rootY<span class=\"token punctuation\">;<\/span><br \/>\n            count<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">getCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u590d\u6742\u5ea6\u5206\u6790<\/h4>\n<table>\n<tr>\u7c7b\u522b\u590d\u6742\u5ea6<\/tr>\n<tbody>\n<tr>\n<td>\u65f6\u95f4\u590d\u6742\u5ea6<\/td>\n<td>O(m \u00d7 n \u00d7 \u03b1(m \u00d7 n)) 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\/>\n<h3>\u4e03\u3001\u603b\u7ed3\u5bf9\u6bd4<\/h3>\n<table>\n<tr>\u89e3\u6cd5\u601d\u8def\u7c7b\u578b\u65f6\u95f4\u590d\u6742\u5ea6\u7a7a\u95f4\u590d\u6742\u5ea6\u4f18\u7f3a\u70b9<\/tr>\n<tbody>\n<tr>\n<td>DFS<\/td>\n<td>\u9012\u5f52\u641c\u7d22<\/td>\n<td>O(m\u00d7n)<\/td>\n<td>O(m\u00d7n)<\/td>\n<td>\u5b9e\u73b0\u7b80\u5355&#xff0c;\u903b\u8f91\u76f4\u89c2&#xff1b;\u9012\u5f52\u6808\u8f83\u6df1\u65f6\u5360\u5185\u5b58\u8f83\u5927<\/td>\n<\/tr>\n<tr>\n<td>BFS<\/td>\n<td>\u961f\u5217\u641c\u7d22<\/td>\n<td>O(m\u00d7n)<\/td>\n<td>O(min(m,n))<\/td>\n<td>\u53ef\u907f\u514d\u9012\u5f52\u6808\u6ea2\u51fa&#xff1b;\u4ee3\u7801\u7a0d\u7e41\u7410<\/td>\n<\/tr>\n<tr>\n<td>Union-Find<\/td>\n<td>\u6570\u636e\u7ed3\u6784\u5408\u5e76<\/td>\n<td>O(m\u00d7n\u00d7\u03b1)<\/td>\n<td>O(m\u00d7n)<\/td>\n<td>\u7406\u8bba\u4f18\u96c5&#xff1b;\u4ee3\u7801\u590d\u6742&#xff1b;\u9002\u5408\u66f4\u5927\u89c4\u6a21\u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55 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