{"id":111466,"date":"2026-10-01T10:15:59","date_gmt":"2026-10-01T02:15:59","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/111466.html"},"modified":"2026-10-01T10:15:59","modified_gmt":"2026-10-01T02:15:59","slug":"%e3%80%90%e8%93%9d%e6%a1%a5%e6%9d%af%e3%80%910%e4%bb%99%e5%a2%83%e8%af%85%e5%92%92-bfs-dfs-%e5%9b%be%e8%ae%ba%e8%bf%9e%e9%80%9a%e6%80%a7%e9%97%ae%e9%a2%98%ef%bc%88c-%e9%a2%98%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/111466.html","title":{"rendered":"\u3010\u84dd\u6865\u676f\u30110\u4ed9\u5883\u8bc5\u5492 \u2014 BFS\/DFS \u56fe\u8bba\u8fde\u901a\u6027\u95ee\u9898\uff08C++ \u9898\u89e3\uff09"},"content":{"rendered":"<h2>\u3010\u84dd\u6865\u676f\u30110\u4ed9\u5883\u8bc5\u5492 \u2014 BFS\/DFS \u56fe\u8bba\u8fde\u901a\u6027\u95ee\u9898&#xff08;C&#043;&#043; \u9898\u89e3&#xff09;<\/h2>\n<h3>1. \u9898\u76ee\u63cf\u8ff0<\/h3>\n<ul>\n<li>\u9898\u76ee\u6765\u6e90&#xff1a;\u84dd\u6865\u4e91\u8bfe &#8211; 0\u4ed9\u5883\u8bc5\u5492<\/li>\n<li>\u96be\u5ea6&#xff1a;\u6613 (LV.1)<\/li>\n<li>\u6807\u7b7e&#xff1a;DFS \/ BFS \/ \u56fe\u7684\u8fde\u901a\u6027<\/li>\n<\/ul>\n<h4>\u95ee\u9898\u7b80\u8ff0<\/h4>\n<p>\u5728\u4ed9\u5883\u4e2d\u6709 N \u4f4d\u4fee\u4ed9\u8005&#xff0c;\u5750\u6807\u5206\u522b\u4e3a (X_i, Y_i)\u3002\u7b2c\u4e00\u4f4d\u4fee\u4ed9\u8005&#xff08;\u59ae\u59ae&#xff0c;\u5373\u4e0b\u6807\u4e3a 0 \u7684\u4fee\u4ed9\u8005&#xff09;\u53d7\u5230\u4e86\u8bc5\u5492\u3002<br \/>\n\u8bc5\u5492\u5177\u6709\u4f20\u9012\u6027&#xff1a;\u5982\u679c\u4e00\u4e2a\u4fee\u4ed9\u8005\u88ab\u8bc5\u5492&#xff0c;\u90a3\u4e48\u8ddd\u79bb\u4ed6\u4e0d\u8d85\u8fc7 D \u7684\u8303\u56f4\u5185\u7684\u6240\u6709\u4fee\u4ed9\u8005\u4e5f\u90fd\u4f1a\u88ab\u8bc5\u5492\u3002<br \/>\n\u8bf7\u6c42\u51fa\u6700\u7ec8\u54ea\u4e9b\u4fee\u4ed9\u8005\u4f1a\u88ab\u8bc5\u5492\u3002<\/p>\n<ul>\n<li>\u6570\u636e\u8303\u56f4&#xff1a;\n<ul>\n<li>1 &lt;&#061; N &lt;&#061; 1000<\/li>\n<li>-1000 &lt;&#061; X_i, Y_i &lt;&#061; 1000&#xff08;\u5750\u6807\u4e3a\u5b9e\u6570&#xff09;<\/li>\n<li>1 &lt;&#061; D &lt;&#061; 1000<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>2. \u5e38\u89c1\u8bef\u533a\u4e0e\u539f\u4ee3\u7801\u5206\u6790<\/h3>\n<p>\u5f88\u591a\u521d\u5b66\u8005\u5bb9\u6613\u5c06\u9898\u76ee\u7406\u89e3\u4e3a\u201c\u53ea\u8ba1\u7b97\u6bcf\u4e2a\u4eba\u5230\u539f\u70b9 (0,0) \u6216\u59ae\u59ae\u7684\u8ddd\u79bb\u201d\u3002<\/p>\n<p>\u5178\u578b\u9519\u8bef\u601d\u8def&#xff1a;<\/p>\n<ul>\n<li>\u4ec5\u5224\u65ad\u6bcf\u4e2a\u4fee\u4ed9\u8005\u5230\u59ae\u59ae\u7684\u8ddd\u79bb\u662f\u5426 &lt;&#061; D\u3002<\/li>\n<li>\u5ffd\u7565\u4e86\u8fde\u901a\u6027&#xff08;\u8fde\u9501\u4f20\u64ad&#xff09;&#xff1a;\u5373\u4fbf\u4fee\u4ed9\u8005 C \u8ddd\u79bb\u59ae\u59ae\u8d85\u8fc7 D&#xff0c;\u4f46\u53ea\u8981 C \u8ddd\u79bb\u201c\u5df2\u88ab\u8bc5\u5492\u7684\u4fee\u4ed9\u8005 B\u201d\u4e0d\u8d85\u8fc7 D&#xff0c;C \u5c31\u4f1a\u88ab\u611f\u67d3\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>3. \u89e3\u9898\u601d\u8def<\/h3>\n<p>\u672c\u9898\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u65e0\u5411\u56fe\u7684\u8fde\u901a\u5757\u904d\u5386\u95ee\u9898&#xff1a;<\/p>\n<li>\u5efa\u7acb\u8fde\u901a\u5173\u7cfb&#xff1a;\u4e24\u70b9 u \u548c v \u4e4b\u95f4\u7684\u6b27\u6c0f\u8ddd\u79bb\u5c0f\u4e8e\u7b49\u4e8e D&#xff08;\u5373 (X_u &#8211; X_v)^2 &#043; (Y_u &#8211; Y_v)^2 &lt;&#061; D^2&#xff09;\u65f6&#xff0c;\u4e24\u70b9\u4e4b\u95f4\u5b58\u5728\u4e00\u6761\u65e0\u5411\u8fb9\u3002<\/li>\n<li>\u56fe\u7684\u904d\u5386&#xff1a;\u4ece\u8d77\u70b9 0&#xff08;\u59ae\u59ae&#xff09;\u5f00\u59cb&#xff0c;\u4f7f\u7528 BFS&#xff08;\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22&#xff09; \u6216 DFS&#xff08;\u6df1\u5ea6\u4f18\u5148\u641c\u7d22&#xff09; \u904d\u5386\u6240\u6709\u53ef\u8fbe\u7684\u70b9\u3002<\/li>\n<li>\u7cbe\u5ea6\u5904\u7406&#xff1a;\u5750\u6807\u4e3a\u5b9e\u6570&#xff0c;\u8ba1\u7b97\u8ddd\u79bb\u5e73\u65b9\u65f6\u7528 double \u5b58\u50a8&#xff0c;\u6bd4\u8f83\u65f6\u53ef\u52a0\u4e0a\u5fae\u5c0f\u7684\u6d6e\u70b9\u8bef\u5dee\u5bb9\u9650&#xff08;\u5982 1e-9&#xff09;\u3002<\/li>\n<p>\u7531\u4e8e N &lt;&#061; 1000&#xff0c;\u6574\u4f53\u5224\u65ad\u7684\u590d\u6742\u5ea6\u4e3a O(N^2)&#xff0c;\u53ef\u4ee5\u5b8c\u7f8e\u5728 2 \u79d2\u5185\u901a\u8fc7\u3002<\/p>\n<hr \/>\n<h3>4. C&#043;&#043; AC \u4ee3\u7801<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;bits\/stdc&#043;&#043;.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8ba1\u7b97\u4e24\u70b9\u4e4b\u95f4\u7684\u6b27\u6c0f\u8ddd\u79bb\u5e73\u65b9<\/span><br \/>\n<span class=\"token keyword\">double<\/span> <span class=\"token function\">distSq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> x1<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> y1<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> x2<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> y2<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>x1 <span class=\"token operator\">&#8211;<\/span> x2<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span>x1 <span class=\"token operator\">&#8211;<\/span> x2<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>y1 <span class=\"token operator\">&#8211;<\/span> y2<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span>y1 <span class=\"token operator\">&#8211;<\/span> y2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4f18\u5316\u8f93\u5165\u8f93\u51fa\u6548\u7387<\/span><br \/>\n    ios<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sync_with_stdio<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    cin<span class=\"token punctuation\">.<\/span><span class=\"token function\">tie<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span>cin <span class=\"token operator\">&gt;&gt;<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    vector<span class=\"token operator\">&lt;<\/span>pair<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span><span class=\"token operator\">&gt;&gt;<\/span> <span class=\"token function\">p<\/span><span class=\"token punctuation\">(<\/span>n<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> n<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        cin <span class=\"token operator\">&gt;&gt;<\/span> p<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>first <span class=\"token operator\">&gt;&gt;<\/span> p<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>second<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">double<\/span> d<span class=\"token punctuation\">;<\/span><br \/>\n    cin <span class=\"token operator\">&gt;&gt;<\/span> d<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">double<\/span> d2 <span class=\"token operator\">&#061;<\/span> d <span class=\"token operator\">*<\/span> d<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8ddd\u79bb\u9608\u503c\u7684\u5e73\u65b9<\/span><\/p>\n<p>    vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">bool<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">vis<\/span><span class=\"token punctuation\">(<\/span>n<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    queue<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> q<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8d77\u70b9&#xff1a;\u7b2c 0 \u4f4d\u4fee\u4ed9\u8005&#xff08;\u59ae\u59ae&#xff09;\u9996\u5148\u88ab\u8bc5\u5492<\/span><br \/>\n    vis<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    q<span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ BFS \u904d\u5386<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>q<span class=\"token punctuation\">.<\/span><span class=\"token function\">empty<\/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> u <span class=\"token operator\">&#061;<\/span> q<span class=\"token punctuation\">.<\/span><span class=\"token function\">front<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        q<span class=\"token punctuation\">.<\/span><span class=\"token function\">pop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><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> v <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> v <span class=\"token operator\">&lt;<\/span> n<span class=\"token punctuation\">;<\/span> v<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><span class=\"token operator\">!<\/span>vis<span class=\"token punctuation\">[<\/span>v<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u5224\u65ad u \u4e0e v \u4e4b\u95f4\u7684\u8ddd\u79bb\u5e73\u65b9\u662f\u5426 &lt;&#061; D^2<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">distSq<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">[<\/span>u<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>first<span class=\"token punctuation\">,<\/span> p<span class=\"token punctuation\">[<\/span>u<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>second<span class=\"token punctuation\">,<\/span> p<span class=\"token punctuation\">[<\/span>v<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>first<span class=\"token punctuation\">,<\/span> p<span class=\"token punctuation\">[<\/span>v<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>second<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&#061;<\/span> d2 <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1e-9<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    vis<span class=\"token punctuation\">[<\/span>v<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    q<span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>v<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><\/p>\n<p>    <span class=\"token comment\">\/\/ \u987a\u5e8f\u8f93\u51fa\u7ed3\u679c<\/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> n<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        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token punctuation\">(<\/span>vis<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">?<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>5. \u590d\u6742\u5ea6\u5206\u6790<\/h3>\n<ul>\n<li>\n<p>\u65f6\u95f4\u590d\u6742\u5ea6&#xff1a;<span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">O(N2)\\\\mathcal{O}(N^2)<\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 1.0641em;vertical-align: -0.25em\"><\/span><span class=\"mord mathcal\" style=\"margin-right: 0.0278em\">O<\/span><span class=\"mopen\">(<\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.109em\">N<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8141em\"><span class=\"\" style=\"top: -3.063em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span><\/span><br \/>\n\u6bcf\u4e2a\u8282\u70b9\u5165\u961f\u4e00\u6b21&#xff0c;\u904d\u5386\u6bcf\u4e2a\u8282\u70b9\u65f6\u626b\u63cf\u5176\u4f59 <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">NN<\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.109em\">N<\/span><\/span><\/span><\/span><\/span> \u4e2a\u8282\u70b9&#xff0c;\u5bf9 <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">N\u22641000N \\\\le 1000<\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8193em;vertical-align: -0.136em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.109em\">N<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2264<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">1000<\/span><\/span><\/span><\/span><\/span> \u800c\u8a00&#xff0c;\u8ba1\u7b97\u91cf\u7ea6\u4e3a <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">10610^6<\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8141em\"><\/span><span class=\"mord\">1<\/span><span class=\"mord\"><span class=\"mord\">0<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8141em\"><span class=\"\" style=\"top: -3.063em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> \u6b21&#xff0c;\u8f7b\u677e\u5728 2 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vis \u53ca BFS \u961f\u5217\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u3010\u84dd\u6865\u676f\u30110\u4ed9\u5883\u8bc5\u5492 \u2014 BFS\/DFS \u56fe\u8bba\u8fde\u901a\u6027\u95ee\u9898&#xff08;C \u9898\u89e3&#xff09;<br \/>\n1. \u9898\u76ee\u63cf\u8ff0<br \/>\n\u9898\u76ee\u6765\u6e90&#xff1a;\u84dd\u6865\u4e91\u8bfe &#8211; 0\u4ed9\u5883\u8bc5\u5492\u96be\u5ea6&#xff1a;\u6613 (LV.1)\u6807\u7b7e&#xff1a;DFS \/ BFS \/ \u56fe\u7684\u8fde\u901a\u6027<br \/>\n\u95ee\u9898\u7b80\u8ff0<br \/>\n\u5728\u4ed9\u5883\u4e2d\u6709 N \u4f4d\u4fee\u4ed9\u8005&#xff0c;\u5750\u6807\u5206\u522b\u4e3a (X_i, Y_i)\u3002\u7b2c\u4e00\u4f4d\u4fee\u4ed9\u8005&#xff08;\u59ae\u59ae&#xff0c;\u5373\u4e0b\u6807\u4e3a 0 \u7684\u4fee\u4ed9\u8005&#xff09;\u53d7\u5230\u4e86\u8bc5\u5492\u3002<br 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