{"id":174,"date":"2012-09-11T17:51:00","date_gmt":"2012-09-11T09:51:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/76"},"modified":"2012-09-11T17:51:00","modified_gmt":"2012-09-11T09:51:00","slug":"hysbz_1050_queue_-_size_edge_the_ratio_of_the_maximum_path","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=174","title":{"rendered":"HYSBZ 1050(\u961f\u5217-\u5927\u5c0f\u8fb9\u6bd4\u503c\u6700\u5927\u7684\u8def\u5f84\uff09"},"content":{"rendered":"<p>\u5df2\u77e5\u8fb9\uff0c\u5224\u65ad2\u70b9\u8fde\u901a\u6027<\/p>\n<p>\u8981\u7528\u5e76\u67e5\u96c6\u2026\u2026\u5343\u4e07\u522b\u641c\u554a~<\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program ee;\nvar\n   edge:array[1..10000,1..3] of longint;\n   s,t,n,m,i,j,pmax,pmin:longint;\n   father:array[1..1000] of longint;\n\nprocedure swap(var a,b:longint);\nvar\n   p:longint;\nbegin\n   p:=a;\n   a:=b;\n   b:=p;\nend;\nprocedure qsort(l,r:longint);\nvar\n   i,j,m,p:longint;\nbegin\n   i:=l;\n   j:=r;\n   m:=edge[(l+r) shr 1,3];\n   repeat\n      while edge[i,3]&lt;m do inc(i);\n      while edge[j,3]&gt;m do dec(j);\n      if i&lt;=j then\n      begin\n         swap(edge[i,1],edge[j,1]);\n         swap(edge[i,2],edge[j,2]);\n         swap(edge[i,3],edge[j,3]);\n         inc(i);dec(j);\n      end;\n   until i&gt;j;\n   if l&lt;j then qsort(l,j);\n   if i&lt;r then qsort(i,r);\n\nend;\nfunction gcd(a,b:longint):longint;\nbegin\n   if b=0 then exit(a) else exit(gcd(b,a mod b));\nend;\nfunction getfather(x:longint):longint;\nbegin\n   if father[x]=x then exit(x) else father[x]:=getfather(father[x]);\n   exit(father[x]);\nend;\nbegin\n   pmax:=50000000;pmin:=1;\n   read(n,m);\n   for i:=1 to m do read(edge[i,1],edge[i,2],edge[i,3]);\n   read(s,t);\n   qsort(1,m);\n   i:=1;\n\n   for i:=1 to m do\n   begin\n      for j:=1 to n do father[j]:=j;\n      j:=i;\n      while (getfather(s)&lt;&gt;getfather(t)) and (j&lt;=m) do\n      begin\n         if getfather(edge[j,2])&lt;&gt;getfather(edge[j,1]) then father[father[edge[j,2]]]:=father[father[edge[j,1]]];\n         inc(j);\n      end;\n      if getfather(s)=getfather(t) then\n      begin\n         dec(j);\n         if (pmax\/pmin&gt;edge[j,3]\/edge[i,3]) then\n         begin\n            pmax:=edge[j,3];\n            pmin:=edge[i,3];\n         end;\n      end;\n\n   end;\n\n\n\n   if pmax=50000000 then writeln('IMPOSSIBLE')\n   else if (pmax mod pmin=0) then writeln(pmax div pmin)\n   else\n   begin\n      i:=gcd(pmax,pmin);\n      pmax:=pmax div i;pmin:=pmin div i;\n      writeln(pmax,'\/',pmin);\n   end;\n\nend.\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5df2\u77e5\u8fb9\uff0c\u5224\u65ad2\u70b9\u8fde\u901a\u6027 \u8981\u7528\u5e76\u67e5\u96c6\u2026\u2026\u5343\u4e07\u522b\u641c\u554a~ Program ee; var edge:array[1. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[3],"tags":[76,85],"class_list":["post-174","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-and_check_the_set","tag-minimum_spanning_tree"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HYSBZ 1050(\u961f\u5217-\u5927\u5c0f\u8fb9\u6bd4\u503c\u6700\u5927\u7684\u8def\u5f84\uff09 - nike0good<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nike0good.com\/?p=174\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HYSBZ 1050(\u961f\u5217-\u5927\u5c0f\u8fb9\u6bd4\u503c\u6700\u5927\u7684\u8def\u5f84\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"\u5df2\u77e5\u8fb9\uff0c\u5224\u65ad2\u70b9\u8fde\u901a\u6027 \u8981\u7528\u5e76\u67e5\u96c6\u2026\u2026\u5343\u4e07\u522b\u641c\u554a~ Program ee; var edge:array[1. 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