{"id":150,"date":"2012-08-17T13:46:00","date_gmt":"2012-08-17T05:46:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/38"},"modified":"2012-08-17T13:46:00","modified_gmt":"2012-08-17T05:46:00","slug":"poj_1860_judged_positive_circle","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=150","title":{"rendered":"POJ 1860\uff08\u5224\u5b9a\u6b63\u5708\uff09"},"content":{"rendered":"<p>Bellman_ford<\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program P1860;\nvar\n   n,m,i,j,s:longint;\n   v:double;\n   flag:boolean;\n   d:array[1..100] of double;\n   x,y:array[1..100] of longint;\n   map:array[1..100,1..4] of double;\nprocedure relax(i:longint);\nbegin\n   if (d[y[i]]&lt;(d[x[i]]-map[i,2])*map[i,1]) then\n   begin\n      d[y[i]]:=(d[x[i]]-map[i,2])*map[i,1];\n      flag:=false;\n   end;\n   if (d[x[i]]&lt;(d[y[i]]-map[i,4])*map[i,3]) then\n   begin\n      d[x[i]]:=(d[y[i]]-map[i,4])*map[i,3];\n      flag:=false;\n   end;\n\nend;\nprocedure bell_ford;\nvar\n   i,j:longint;\nbegin\n   for i:=1 to n do\n   begin\n      flag:=true;\n      for j:=1 to m do relax(j);\n      if flag then break;\n   end;\n   if flag then writeln('NO')\n   else writeln('YES');\nend;\nbegin\n   while not seekeof do\n   begin\n      readln(n,m,s,v);\n      fillchar(d,sizeof(d),0);\n      d[s]:=v;\n      for i:=1 to m do\n      begin\n         readln(x[i],y[i],map[i,1],map[i,2],map[i,3],map[i,4]);\n      end;\n      bell_ford;\n   end;\nend.<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bellman_ford Program P1860; var n,m,i,j,s:longint; v:do [&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":[65],"class_list":["post-150","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-graph_theory"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>POJ 1860\uff08\u5224\u5b9a\u6b63\u5708\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=150\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POJ 1860\uff08\u5224\u5b9a\u6b63\u5708\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"Bellman_ford Program P1860; 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