{"id":410,"date":"2018-11-12T13:11:44","date_gmt":"2018-11-12T05:11:44","guid":{"rendered":"http:\/\/SmokeyDays.top\/wordpress\/?p=410"},"modified":"2018-11-12T13:13:36","modified_gmt":"2018-11-12T05:13:36","slug":"noip2018-%e6%97%85%e8%a1%8c","status":"publish","type":"post","link":"http:\/\/SmokeyDays.top\/wordpress\/2018\/11\/12\/noip2018-%e6%97%85%e8%a1%8c\/","title":{"rendered":"NOIP2018 \u65c5\u884c"},"content":{"rendered":"

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\n\u8fd9\u5c31\u505a\u5b8c\u4e86\u3002<\/p>\n

#include<iostream>\r\n#include<cstdio>\r\n#include<algorithm>\r\nint n,m;\r\nstruct ee{\r\n\tint v;\r\n\tint nxt;\r\n}e[10005];\r\nint h[5005],et=0;\r\ninline void add(int u,int v){\r\n\te[++et]=(ee){v,h[u]};\r\n\th[u]=et;\r\n}\r\nstruct e0{\r\n\tint u;\r\n\tint v;\r\n\tbool operator<(const e0 &B)const{\r\n\t\treturn (u==B.u)?(v>B.v):(u<B.u);\r\n\t}\r\n}e0[10005],e00[5005];\r\nint Du,Dv,ans[5005],Ans[5005],at=0;\r\nbool vis[5005];\r\ninline void dfs(int X){\r\n\tvis[X]=1,ans[++at]=X;\r\n\tfor(int i=h[X];i;i=e[i].nxt){\r\n\t\tif(vis[e[i].v]||(e[i].v==Du&&X==Dv)||(e[i].v==Dv&&X==Du)){\r\n\t\t\tcontinue;\r\n\t\t}\r\n\t\tdfs(e[i].v);\r\n\t}\r\n}\r\nvoid init(){\r\n\tscanf(\"%d%d\",&n,&m);\r\n\tfor(int i=1;i<=m;++i){\r\n\t\tscanf(\"%d%d\",&e0[i].u,&e0[i].v);\r\n\t\te00[i].u=e0[i].u,e00[i].v=e0[i].v;\r\n\t\te0[i+m].u=e0[i].v,e0[i+m].v=e0[i].u;\r\n\t}\r\n\tstd::sort(e0+1,e0+(m<<1|1));\r\n\tfor(int i=1;i<=(m<<1);++i){\r\n\t\tadd(e0[i].u,e0[i].v);\r\n\t}\r\n\tif(m==n-1){\r\n\t\tDu=0,Dv=0;\r\n\t\tdfs(1);\r\n\t\tfor(int i=1;i<=n;++i){\r\n\t\t\tprintf(\"%d \",ans[i]);\r\n\t\t}\r\n\t\treturn;\r\n\t}else if(m==n){\r\n\t\tfor(int i=1;i<=n;++i){\r\n\t\t\tAns[i]=0x3f3f3f3f;\r\n\t\t}\r\n\t\tfor(int i=1;i<=m;++i){\r\n\t\t\tDu=e00[i].u,Dv=e00[i].v;\r\n\t\t\tat=0;\r\n\t\t\tfor(int j=1;j<=n;++j){\r\n\t\t\t\tvis[j]=0;\r\n\t\t\t}\r\n\t\t\tdfs(1);\r\n\t\t\tif(at==n){\r\n\t\t\t\tfor(int j=1;j<=n;++j){\r\n\t\t\t\t\tif(ans[j]==Ans[j]){\r\n\t\t\t\t\t\tcontinue;\r\n\t\t\t\t\t}else if(ans[j]>Ans[j]){\r\n\t\t\t\t\t\tbreak;\r\n\t\t\t\t\t}else{\r\n\t\t\t\t\t\tfor(int k=1;k<=n;++k){\r\n\t\t\t\t\t\t\tAns[k]=ans[k];\r\n\t\t\t\t\t\t}\r\n\t\t\t\t\t\tbreak;\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t\tfor(int i=1;i<=n;++i){\r\n\t\t\tprintf(\"%d \",Ans[i]);\r\n\t\t}\r\n\t}\r\n}\r\nint main(){\r\n\tinit();\r\n\treturn 0;\r\n}<\/code><\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u5927\u610f\uff1a\u6c42\u4e00\u68f5\u6811\u7684\u6700\u5c0fDFS\u5e8f\uff0c\u548c\u4e00\u5f20n\u6761\u8fb9\u7684\u8fde\u901a\u56fe\u5220\u53bb\u4efb\u610f\u4e00\u6761\u8fb9\u4ee5\u540e\u7684\u6700\u5c0fDFS\u5e8f\u3002 \u8bdd\u8bf4\u8fd9\u4e00\u9898\u548c\u6211\u51fa\u8fc7\u7684 … <\/p>\n
\u7ee7\u7eed\u9605\u8bfb\u201cNOIP2018 \u65c5\u884c\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":[10,30,53,6,5],"tags":[],"_links":{"self":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/410"}],"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=410"}],"version-history":[{"count":1,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/410\/revisions"}],"predecessor-version":[{"id":411,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/410\/revisions\/411"}],"wp:attachment":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/media?parent=410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/categories?post=410"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/tags?post=410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}