{"id":92870,"date":"2026-08-11T12:56:41","date_gmt":"2026-08-11T04:56:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/92870.html"},"modified":"2026-08-11T12:56:41","modified_gmt":"2026-08-11T04:56:41","slug":"pta%e5%9b%a2%e4%bd%93%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1%e5%a4%a9%e6%a2%af%e8%b5%9bl2%e7%9c%9f%e9%a2%98%e8%ae%b2%e8%a7%a3l2-021-024","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/92870.html","title":{"rendered":"PTA\u56e2\u4f53\u7a0b\u5e8f\u8bbe\u8ba1\u5929\u68af\u8d5bL2\u771f\u9898\u8bb2\u89e3L2-021-024"},"content":{"rendered":"<p>\u5b98\u7f51https:\/\/pintia.cn\/problem-sets\/994805046380707840\/exam\/problems\/type\/7<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\n<ul>\n<li>L2-021 \u70b9\u8d5e\u72c2\u9b54<\/li>\n<li>L2-022 \u91cd\u6392\u94fe\u8868<\/li>\n<li>L2-023 \u56fe\u7740\u8272\u95ee\u9898<\/li>\n<li>L2-024 \u90e8\u843d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>L2-021 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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 comment\">\/\/#define int long long<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> N<span class=\"token operator\">&#061;<\/span><span class=\"token number\">110<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">;<\/span><br \/>\nstring s<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">no<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    string id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> num<span class=\"token punctuation\">,<\/span>ave<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token keyword\">operator<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> no n1<span class=\"token punctuation\">)<\/span><span class=\"token keyword\">const<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>num<span class=\"token operator\">!&#061;<\/span>n1<span class=\"token punctuation\">.<\/span>num<span class=\"token punctuation\">)<\/span><span class=\"token keyword\">return<\/span> num<span class=\"token operator\">&gt;<\/span>n1<span class=\"token punctuation\">.<\/span>num<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> ave<span class=\"token operator\">&lt;<\/span>n1<span class=\"token punctuation\">.<\/span>ave<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>a<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">signed<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    cin<span class=\"token operator\">&gt;&gt;<\/span>n<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>a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> k<span class=\"token punctuation\">;<\/span><br \/>\n        cin<span class=\"token operator\">&gt;&gt;<\/span>k<span class=\"token punctuation\">;<\/span><br \/>\n        set<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span>s<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>k<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\">int<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\n            cin<span class=\"token operator\">&gt;&gt;<\/span>y<span class=\"token punctuation\">;<\/span><br \/>\n            s<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>num<span class=\"token operator\">&#061;<\/span>s<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>ave<span class=\"token operator\">&#061;<\/span>k<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>a<span class=\"token operator\">&#043;<\/span>n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> mm<span class=\"token operator\">&#061;<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/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>mm<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><\/p>\n<p>        cout<span class=\"token operator\">&lt;&lt;<\/span>a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">;<\/span><br \/>\n         <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token operator\">!&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>n<span class=\"token operator\">&lt;<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><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><span class=\"token number\">3<\/span><span class=\"token operator\">&#8211;<\/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><\/p>\n<p>        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;-&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n         <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token operator\">!&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token operator\">&#8211;<\/span>n<span class=\"token punctuation\">)<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <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<p>\u4ee3\u7801\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u5b9a\u4e49\u7ed3\u6784\u4f53\u5b58\u50a8\u7528\u6237\u540d\u3001\u4e0d\u540c\u6807\u7b7e\u6570num\u3001\u6807\u7b7e\u603b\u6570ave&#xff08;\u53d8\u91cf\u540d\u5b9e\u9645\u8868\u793a\u603b\u4e2a\u6570&#xff0c;\u7528\u4e8e\u95f4\u63a5\u6bd4\u8f83\u5e73\u5747\u503c&#xff09;\u3002<\/li>\n<li>\u91cd\u8f7d&lt;\u8fd0\u7b97\u7b26\u5b9e\u73b0\u81ea\u5b9a\u4e49\u6392\u5e8f&#xff0c;\u4fdd\u8bc1\u6392\u5e8f\u540e\u7b26\u5408\u9898\u76ee\u4f18\u5148\u7ea7\u3002<\/li>\n<li>\u8f93\u5165\u65f6\u901a\u8fc7set\u53bb\u91cd&#xff0c;s.size()\u5373\u4e3a\u4e0d\u540c\u6807\u7b7e\u6570\u91cf\u3002<\/li>\n<li>\u8f93\u51fa\u90e8\u5206\u5148\u8f93\u51fa\u524dmin(3,n)\u4e2a\u7528\u6237\u540d&#xff0c;\u518d\u6839\u636e\u603b\u4eba\u6570\u8865\u5168-&#xff0c;\u540c\u65f6\u63a7\u5236\u884c\u672b\u65e0\u591a\u4f59\u7a7a\u683c\u3002<\/li>\n<\/ul>\n<p>\u5c0f\u6280\u5de7&#xff1a;<\/p>\n<ul>\n<li>\u5e73\u5747\u503c &#061; \u603b\u6807\u7b7e\u6570 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\u7684\u5f62\u5f0f&#xff0c;\u6309\u6307\u5b9a\u683c\u5f0f\u8f93\u51fa\u91cd\u6392\u540e\u7684\u94fe\u8868\u3002<\/p>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<li>\u94fe\u8868\u7ebf\u6027\u5316&#xff1a;\u5148\u6839\u636e\u5934\u7ed3\u70b9\u5730\u5740\u904d\u5386\u94fe\u8868&#xff0c;\u5c06\u6240\u6709\u8282\u70b9\u6309\u539f\u987a\u5e8f\u5b58\u5165\u6570\u7ec4&#xff0c;\u5f97\u5230\u6709\u5e8f\u7684\u8282\u70b9\u5e8f\u5217&#xff0c;\u540c\u65f6\u8fc7\u6ee4\u6389\u4e0d\u5728\u94fe\u8868\u4e0a\u7684\u65e0\u6548\u8282\u70b9\u3002<\/li>\n<li>\u53cc\u6307\u9488\u91cd\u6784&#xff1a;\u4f7f\u7528\u5de6\u6307\u9488\u6307\u5411\u94fe\u8868\u5934\u90e8&#xff0c;\u53f3\u6307\u9488\u6307\u5411\u94fe\u8868\u5c3e\u90e8&#xff0c;\u4ea4\u66ff\u4ece\u5c3e\u90e8\u3001\u5934\u90e8\u53d6\u8282\u70b9&#xff0c;\u62fc\u63a5\u6210\u65b0\u7684\u94fe\u8868\u987a\u5e8f\u3002<\/li>\n<li>\u683c\u5f0f\u5316\u8f93\u51fa&#xff1a;\u6bcf\u4e2a\u8282\u70b9\u5730\u5740\u63095\u4f4d\u8865\u96f6\u8f93\u51fa&#xff0c;\u6700\u540e\u4e00\u4e2a\u8282\u70b9\u7684\u540e\u7ee7\u5730\u5740\u4e3a-1\u3002<\/li>\n<p>\u6b63\u89e3\u4ee3\u7801<\/p>\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><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> N<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1e5<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">node<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> id<span class=\"token punctuation\">,<\/span>x<span class=\"token punctuation\">,<\/span>next<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>l<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmap<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span>mp<span class=\"token punctuation\">;<\/span><br \/>\n<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 keyword\">int<\/span> head<span class=\"token punctuation\">,<\/span>n<span class=\"token punctuation\">;<\/span><br \/>\n    cin<span class=\"token operator\">&gt;&gt;<\/span>head<span class=\"token operator\">&gt;&gt;<\/span>n<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>l<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token operator\">&gt;&gt;<\/span>l<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>x<span class=\"token operator\">&gt;&gt;<\/span>l<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>next<span class=\"token punctuation\">;<\/span><br \/>\n        mp<span class=\"token punctuation\">[<\/span>l<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>i<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> now<span class=\"token operator\">&#061;<\/span>mp<span class=\"token punctuation\">[<\/span>head<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/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\">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        ans<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>l<span class=\"token punctuation\">[<\/span>now<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 keyword\">if<\/span><span class=\"token punctuation\">(<\/span>l<span class=\"token punctuation\">[<\/span>now<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>next<span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        now<span class=\"token operator\">&#061;<\/span>mp<span class=\"token punctuation\">[<\/span>l<span class=\"token punctuation\">[<\/span>now<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>next<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> le<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span>ri<span class=\"token operator\">&#061;<\/span>count<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> cnt<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%05d %d &#034;<\/span><span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>ri<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>ri<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    ri<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>le<span class=\"token operator\">&lt;&#061;<\/span>ri<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>cnt<span class=\"token operator\">&amp;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%05d\\\\n%05d %d &#034;<\/span><span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>ri<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>ri<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>ri<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    ri<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            cnt<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n       <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%05d\\\\n%05d %d &#034;<\/span><span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>le<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>le<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">,<\/span>ans<span class=\"token punctuation\">[<\/span>le<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    le<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n           cnt<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   cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <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<p>\u4ee3\u7801\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u7528\u6570\u7ec4\u5b58\u50a8\u6240\u6709\u8f93\u5165\u8282\u70b9&#xff0c;\u901a\u8fc7map\u5efa\u7acb\u300c\u5730\u5740\u2192\u6570\u7ec4\u4e0b\u6807\u300d\u7684\u6620\u5c04&#xff0c;\u65b9\u4fbf\u5feb\u901f\u901a\u8fc7\u5730\u5740\u5b9a\u4f4d\u8282\u70b9\u3002<\/li>\n<li>\u4ece\u5934\u7ed3\u70b9\u5f00\u59cb\u904d\u5386&#xff0c;\u5c06\u94fe\u8868\u6309\u987a\u5e8f\u5b58\u5165\u7ed3\u679c\u6570\u7ec4&#xff0c;\u540c\u65f6\u7edf\u8ba1\u6709\u6548\u8282\u70b9\u603b\u6570\u3002<\/li>\n<li>\u53cc\u6307\u9488\u4ea4\u66ff\u53d6\u8282\u70b9&#xff0c;\u5148\u53d6\u6700\u53f3\u4fa7\u8282\u70b9&#xff0c;\u518d\u4f9d\u6b21\u53d6\u5de6\u3001\u53f3\u8282\u70b9&#xff0c;\u5b8c\u6210\u91cd\u6392\u3002<\/li>\n<li>\u4f7f\u7528printf(&#034;%05d&#034;)\u5b9e\u73b0\u5730\u5740\u76845\u4f4d\u8865\u96f6\u683c\u5f0f&#xff0c;\u6ee1\u8db3\u8f93\u51fa\u8981\u6c42\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>L2-023 \u56fe\u7740\u8272\u95ee\u9898<\/h4>\n<p>\u9898\u76ee\u5927\u610f&#xff1a;\u7ed9\u5b9a\u65e0\u5411\u56fe\u548c\u989c\u8272\u6570k&#xff0c;\u5224\u65ad\u591a\u7ec4\u989c\u8272\u5206\u914d\u65b9\u6848\u662f\u5426\u4e3a\u5408\u6cd5\u7684\u56fe\u7740\u8272\u89e3&#xff1a;\u8981\u6c42\u6240\u6709\u76f8\u90bb\u9876\u70b9\u989c\u8272\u4e0d\u540c&#xff0c;\u4e14\u6070\u597d\u4f7f\u7528k\u79cd\u989c\u8272\u3002<\/p>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<li>\u76f4\u63a5\u5b58\u50a8\u56fe\u7684\u6240\u6709\u8fb9&#xff0c;\u65e0\u9700\u6784\u5efa\u90bb\u63a5\u8868&#xff0c;\u4fdd\u5b58\u6bcf\u6761\u8fb9\u7684\u4e24\u4e2a\u7aef\u70b9\u5373\u53ef\u3002<\/li>\n<li>\u5bf9\u6bcf\u7ec4\u989c\u8272\u65b9\u6848&#xff1a;\n<ul>\n<li>\u7edf\u8ba1\u4f7f\u7528\u7684\u4e0d\u540c\u989c\u8272\u6570\u91cf&#xff0c;\u82e5\u4e0d\u7b49\u4e8ek\u5219\u76f4\u63a5\u5224\u5b9a\u4e3a\u4e0d\u5408\u6cd5\u3002<\/li>\n<li>\u904d\u5386\u6240\u6709\u8fb9&#xff0c;\u68c0\u67e5\u8fb9\u7684\u4e24\u4e2a\u7aef\u70b9\u989c\u8272\u662f\u5426\u76f8\u540c&#xff0c;\u82e5\u5b58\u5728\u76f8\u540c\u5219\u5224\u5b9a\u4e3a\u4e0d\u5408\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u6839\u636e\u68c0\u67e5\u7ed3\u679c\u8f93\u51faYes\u6216No\u3002<\/li>\n<p>\u6b63\u89e3\u4ee3\u7801<\/p>\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><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> N<span class=\"token operator\">&#061;<\/span><span class=\"token number\">521<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">,<\/span>m<span class=\"token punctuation\">,<\/span>k<span class=\"token punctuation\">,<\/span>a<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span>t<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">bool<\/span> fd<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\nvector<span class=\"token operator\">&lt;<\/span>pair<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;&gt;<\/span>g<span class=\"token punctuation\">;<\/span><br \/>\n<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    cin<span class=\"token operator\">&gt;&gt;<\/span>n<span class=\"token operator\">&gt;&gt;<\/span>m<span class=\"token operator\">&gt;&gt;<\/span>t<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>m<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\">int<\/span> u<span class=\"token punctuation\">,<\/span>v<span class=\"token punctuation\">;<\/span><br \/>\n        cin<span class=\"token operator\">&gt;&gt;<\/span>u<span class=\"token operator\">&gt;&gt;<\/span>v<span class=\"token punctuation\">;<\/span><br \/>\n        g<span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>u<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 punctuation\">}<\/span><br \/>\n    cin<span class=\"token operator\">&gt;&gt;<\/span>k<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        map<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span>mp<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\">1<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;&#061;<\/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>a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            mp<span class=\"token punctuation\">[<\/span>a<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        fd<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\">auto<\/span> <span class=\"token punctuation\">[<\/span>u<span class=\"token punctuation\">,<\/span>v<span class=\"token punctuation\">]<\/span><span class=\"token operator\">:<\/span>g<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">[<\/span>u<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;&#061;<\/span>a<span class=\"token punctuation\">[<\/span>v<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>fd<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span>mp<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">!&#061;<\/span>t<span class=\"token punctuation\">)<\/span>fd<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;No&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">else<\/span> cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;Yes&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token char\">&#039;\\\\n&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u4ee3\u7801\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u7528vector&lt;pair&lt;int,int&gt;&gt;\u5b58\u50a8\u6240\u6709\u8fb9&#xff0c;\u5355\u6b21\u68c0\u67e5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(m)&#xff0c;\u9002\u914d\u9898\u76ee\u6570\u636e\u8303\u56f4\u3002<\/li>\n<li>\u7528map\u6216set\u7edf\u8ba1\u989c\u8272\u79cd\u7c7b\u6570&#xff0c;\u6821\u9a8c\u662f\u5426\u6070\u597d\u7b49\u4e8e\u7ed9\u5b9a\u7684\u989c\u8272\u6570\u3002<\/li>\n<li>\u7528\u6807\u8bb0\u53d8\u91cf\u8bb0\u5f55\u662f\u5426\u51fa\u73b0\u975e\u6cd5\u60c5\u51b5&#xff0c;\u4e00\u65e6\u53d1\u73b0\u51b2\u7a81\u53ef\u63d0\u524d\u8df3\u51fa\u5faa\u73af&#xff0c;\u4f18\u5316\u6548\u7387\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>L2-024 \u90e8\u843d<\/h4>\n<p>\u9898\u76ee\u5927\u610f&#xff1a;\u7ed9\u5b9a\u591a\u4e2a\u5c0f\u5708\u5b50&#xff0c;\u5b9a\u4e49\u201c\u670b\u53cb\u7684\u670b\u53cb\u5c5e\u4e8e\u540c\u4e00\u4e2a\u90e8\u843d\u201d\u3002\u8981\u6c42\u7edf\u8ba1\u793e\u533a\u603b\u4eba\u6570\u3001\u4e92\u4e0d\u76f8\u4ea4\u7684\u90e8\u843d\u6570\u91cf&#xff0c;\u5e76\u67e5\u8be2\u591a\u5bf9\u4eba\u5458\u662f\u5426\u5c5e\u4e8e\u540c\u4e00\u4e2a\u90e8\u843d\u3002<\/p>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<ul>\n<li>\u6807\u51c6\u5e76\u67e5\u96c6\u5e94\u7528\u9898&#xff0c;\u5229\u7528\u5e76\u67e5\u96c6\u7ef4\u62a4\u4eba\u5458\u7684\u8fde\u901a\u5173\u7cfb\u3002<\/li>\n<\/ul>\n<li>\u521d\u59cb\u5316\u5e76\u67e5\u96c6&#xff0c;\u6bcf\u4e2a\u5143\u7d20\u7684\u7236\u8282\u70b9\u6307\u5411\u81ea\u5df1\u3002<\/li>\n<li>\u5bf9\u6bcf\u4e2a\u5c0f\u5708\u5b50&#xff0c;\u5c06\u5708\u5b50\u5185\u7684\u6240\u6709\u4eba\u5408\u5e76\u5230\u540c\u4e00\u4e2a\u96c6\u5408\u4e2d\u3002<\/li>\n<li>\u7528\u96c6\u5408\u7edf\u8ba1\u6240\u6709\u51fa\u73b0\u8fc7\u7684\u4eba\u5458\u7f16\u53f7&#xff0c;\u5f97\u5230\u603b\u4eba\u6570&#xff1b;\u518d\u7edf\u8ba1\u6240\u6709\u4eba\u5458\u7684\u6839\u8282\u70b9\u53bb\u91cd\u540e\u7684\u6570\u91cf&#xff0c;\u5373\u4e3a\u90e8\u843d\u4e2a\u6570\u3002<\/li>\n<li>\u5bf9\u6bcf\u4e2a\u67e5\u8be2&#xff0c;\u5224\u65ad\u4e24\u4e2a\u4eba\u7684\u6839\u8282\u70b9\u662f\u5426\u76f8\u540c&#xff0c;\u8f93\u51fa\u5bf9\u5e94\u7ed3\u679c\u3002<\/li>\n<p>\u6b63\u89e3\u4ee3\u7801<\/p>\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 macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">int<\/span> <span class=\"token expression\"><span class=\"token keyword\">long<\/span> <span class=\"token keyword\">long<\/span><\/span><\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span> N<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1e4<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> p<span class=\"token punctuation\">[<\/span>N<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span>t<span class=\"token punctuation\">,<\/span>x<span class=\"token punctuation\">,<\/span>q<span class=\"token punctuation\">,<\/span>k<span class=\"token punctuation\">,<\/span>n<span class=\"token punctuation\">;<\/span><br \/>\nset<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span>s1<span class=\"token punctuation\">;<\/span><br \/>\nset<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span>s2<span class=\"token punctuation\">;<\/span><br \/>\n<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>p<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!&#061;<\/span>x<span class=\"token punctuation\">)<\/span>p<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>p<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 keyword\">return<\/span> p<span class=\"token punctuation\">[<\/span>x<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">signed<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    cin<span class=\"token operator\">&gt;&gt;<\/span>n<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\">1<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;&#061;<\/span>N<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span>p<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>i<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        <span class=\"token keyword\">int<\/span> k<span class=\"token punctuation\">,<\/span>fi<span class=\"token punctuation\">,<\/span>y<span class=\"token punctuation\">;<\/span><br \/>\n        cin<span class=\"token operator\">&gt;&gt;<\/span>k<span class=\"token operator\">&gt;&gt;<\/span>fi<span class=\"token punctuation\">;<\/span><br \/>\n        s1<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>fi<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> f1<span class=\"token operator\">&#061;<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>fi<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\">1<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>k<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>y<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> f2<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            p<span class=\"token punctuation\">[<\/span>f2<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>f1<span class=\"token punctuation\">;<\/span><br \/>\n            s1<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span>y<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    cin<span class=\"token operator\">&gt;&gt;<\/span>q<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">auto<\/span> x<span class=\"token operator\">:<\/span>s1<span class=\"token punctuation\">)<\/span>s2<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    cout<span class=\"token operator\">&lt;&lt;<\/span>s1<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&lt;&lt;<\/span><span class=\"token char\">&#039; &#039;<\/span><span class=\"token operator\">&lt;&lt;<\/span>s2<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&lt;&lt;<\/span><span class=\"token char\">&#039;\\\\n&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>q<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">;<\/span><br \/>\n        cin<span class=\"token operator\">&gt;&gt;<\/span>a<span class=\"token operator\">&gt;&gt;<\/span>b<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> f1<span class=\"token operator\">&#061;<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> f2<span class=\"token operator\">&#061;<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>f1<span class=\"token operator\">&#061;&#061;<\/span>f2<span class=\"token punctuation\">)<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;Y\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">else<\/span> cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;N\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u4ee3\u7801\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>find\u51fd\u6570\u5b9e\u73b0\u8def\u5f84\u538b\u7f29&#xff0c;\u5927\u5e45\u4f18\u5316\u67e5\u8be2\u6548\u7387\u3002<\/li>\n<li>\u5408\u5e76\u7b56\u7565&#xff1a;\u5c06\u6bcf\u4e2a\u5c0f\u5708\u5b50\u7684\u540e\u7eed\u6210\u5458\u90fd\u5408\u5e76\u5230\u7b2c\u4e00\u4e2a\u6210\u5458\u6240\u5728\u7684\u96c6\u5408\u4e2d\u3002<\/li>\n<li>\u7528\u7b2c\u4e00\u4e2aset\u5b58\u50a8\u6240\u6709\u51fa\u73b0\u8fc7\u7684\u4eba&#xff0c;\u5176\u5927\u5c0f\u5373\u4e3a\u603b\u4eba\u6570&#xff1b;\u904d\u5386\u8be5\u96c6\u5408\u5c06\u6240\u6709\u6839\u8282\u70b9\u5b58\u5165\u7b2c\u4e8c\u4e2aset&#xff0c;\u5176\u5927\u5c0f\u5373\u4e3a\u90e8\u843d\u6570\u91cf\u3002<\/li>\n<li>\u67e5\u8be2\u65f6\u8c03\u7528\u4e24\u6b21find\u6bd4\u8f83\u6839\u8282\u70b9&#xff0c;\u76f8\u540c\u5219\u8f93\u51faY&#xff0c;\u5426\u5219\u8f93\u51faN\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5b98\u7f51https:\/\/pintia.cn\/problem-sets\/994805046380707840\/exam\/problems\/type\/7 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\/>\n\u9898\u76ee\u5927\u610f&#xff1a;\u7edf\u8ba1\u6bcf\u4e2a\u7528\u6237\u70b9\u8d5e\u7684\u4e0d\u540c\u6807\u7b7e\u6570\u91cf&#xff0c;\u9009\u51fa\u6570\u91cf\u6700\u591a\u7684\u524d3\u540d\u4f5c\u4e3a\u201c\u70b9\u8d5e\u72c2\u9b54\u201d\u3002\u82e5\u4e0d\u540c\u6807\u7b7e\u6570\u91cf\u5e76\u5217&#xff0c;\u5219\u9009\u62e9\u6807\u7b7e\u603b\u4e2a\u6570\u66f4\u5c11&#xff08;\u6807\u7b7e\u51fa\u73b0\u6b21\u6570\u5e73\u5747\u503c\u66f4\u5c0f&amp;#xff09<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10623,371,1983,427,124],"topic":[],"class_list":["post-92870","post","type-post","status-publish","format-standard","hentry","category-server","tag-pat","tag-371","tag-1983","tag-427","tag-124"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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