{"id":545,"date":"2018-12-31T19:42:28","date_gmt":"2018-12-31T11:42:28","guid":{"rendered":"http:\/\/SmokeyDays.top\/wordpress\/?p=545"},"modified":"2018-12-31T19:42:28","modified_gmt":"2018-12-31T11:42:28","slug":"lp1640-scoi2010-%e8%bf%9e%e7%bb%ad%e6%94%bb%e5%87%bb%e6%b8%b8%e6%88%8f","status":"publish","type":"post","link":"http:\/\/SmokeyDays.top\/wordpress\/2018\/12\/31\/lp1640-scoi2010-%e8%bf%9e%e7%bb%ad%e6%94%bb%e5%87%bb%e6%b8%b8%e6%88%8f\/","title":{"rendered":"lp1640 SCOI2010 \u8fde\u7eed\u653b\u51fb\u6e38\u620f"},"content":{"rendered":"\n<p>\u4e00\u822c\u5730\uff0c\u5bf9\u4e8e\u517c\u5177\u53ef\u884c\u6027\u548c\u552f\u4e00\u6027\u7684\u95ee\u9898\uff0c\u6211\u4eec\u8003\u8651\u4e8c\u5206\u56fe\u5339\u914d\u3002<br>\n\u5bf9\u4e8e\u8fd9\u4e00\u9898\u6765\u8bf4\uff0c\u6211\u4eec\u8003\u8651\u62c6\u70b9\u3002<br>\n\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u8fd9\u91cc\u7684\u62c6\u70b9\u5e76\u4e0d\u662f\u5c06\u4e00\u4e2a\u70b9\u7684\u4e24\u4e2a\u5c5e\u6027\u62c6\u5f00\u6765\uff0c\u800c\u662f\u5c06\u4e00\u4e2a\u70b9\u7684\u5c5e\u6027\u548c\u7f16\u53f7\u62c6\u5f00\u6765\u3002\u7136\u540e\u8dd1\u5308\u7259\u5229\u3002<br>\n\u5982\u679c\u53ef\u4ee5\u5339\u914d\uff0c\u90a3\u5c31\u7ee7\u7eed\u5339\u914d\uff1b\u5982\u679c\u4e0d\u80fd\u5339\u914d\uff0c\u90a3\u5c31\u8bf4\u660e\u8fd9\u4e2a\u5c5e\u6027\u65e0\u8bba\u5982\u4f55\u4e5f\u53d6\u4e0d\u5230\uff1b\u6216\u8005\u53d6\u5230\u5b83\u9700\u8981\u4ed8\u51fa\u300c\u524d\u9762\u6709\u67d0\u4e2a\u5c5e\u6027\u65e0\u6cd5\u53d6\u5230\u300d\u7684\u4ee3\u4ef7\uff0c\u90a3\u4e48\u5c31\u662f\u6ca1\u6709\u7b54\u6848\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;iostream>\n#include&lt;cstdio>\nstruct ee{\n\tint v;\n\tint nxt;\n}e[2000005];\nint h[10005],et=0;\ninline void add(int U,int V){\n\te[++et]=(ee){V,h[U]};\n\th[U]=et;\n}\n\nint n;\nint vis[1000005],dep;\nint usd[1000005];\n\ninline bool dfs(int X){\n\tfor(int i=h[X];i;i=e[i].nxt){\n\t\tint v=e[i].v;\n\t\tif(vis[v]!=dep){\n\t\t\tvis[v]=dep;\n\t\t\tif(!usd[v]||dfs(usd[v])){\n\t\t\t\tusd[v]=X;\n\t\t\t\treturn 1;\n\t\t\t}\n\t\t}\n\t}\n\treturn 0;\n}\n\nvoid init(){\n\tscanf(\"%d\",&amp;n);\n\tint a,b;\n\tfor(int i=1;i&lt;=n;++i){\n\t\tscanf(\"%d%d\",&amp;a,&amp;b);\n\t\tadd(a,i),add(b,i);\n\t}\n\tint ans=0;\n\tdep=0;\n\tfor(int i=1;i&lt;=n;++i){\n\t\t++dep;\n\t\tif(dfs(i)){\n\t\t\t++ans;\n\t\t}else{\n\t\t\tbreak;\n\t\t}\n\t}\n\tprintf(\"%d\\n\",ans);\n}\n\nint main(){\n\tinit();\n\treturn 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u822c\u5730\uff0c\u5bf9\u4e8e\u517c\u5177\u53ef\u884c\u6027\u548c\u552f\u4e00\u6027\u7684\u95ee\u9898\uff0c\u6211\u4eec\u8003\u8651\u4e8c\u5206\u56fe\u5339\u914d\u3002 \u5bf9\u4e8e\u8fd9\u4e00\u9898\u6765\u8bf4\uff0c\u6211\u4eec\u8003\u8651\u62c6\u70b9\u3002 \u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u8fd9\u91cc &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/SmokeyDays.top\/wordpress\/2018\/12\/31\/lp1640-scoi2010-%e8%bf%9e%e7%bb%ad%e6%94%bb%e5%87%bb%e6%b8%b8%e6%88%8f\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201clp1640 SCOI2010 \u8fde\u7eed\u653b\u51fb\u6e38\u620f\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[65,30,9,6,5],"tags":[],"_links":{"self":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/545"}],"collection":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/comments?post=545"}],"version-history":[{"count":1,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/545\/revisions"}],"predecessor-version":[{"id":546,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/545\/revisions\/546"}],"wp:attachment":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/media?parent=545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/categories?post=545"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/tags?post=545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}