{"id":146,"date":"2012-08-16T18:37:00","date_gmt":"2012-08-16T10:37:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/34"},"modified":"2012-08-16T18:37:00","modified_gmt":"2012-08-16T10:37:00","slug":"poj_2983_differential_constraints_-_with_or_without_solution","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=146","title":{"rendered":"POJ 2983(\u5dee\u5206\u7ea6\u675f-\u6709\u65e0\u89e3\uff09"},"content":{"rendered":"<p>\u5dee\u5206\u7ea6\u675f\u2026\u2026<\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program p2983;\nvar\n   n,m,i,j,p:longint;\n   c:char;\n   flag:boolean;\n   d:array[0..5000] of longint;\n   w:array[1..100100,1..3] of longint;\nprocedure relax(v,u,w:longint);\nbegin\n   if (d[v]&gt;d[u]+w) then\n   begin\n      d[v]:=d[u]+w;\n      flag:=false;\n   end;\nend;\nprocedure bellman_ford;\nvar\n   i,j,k:longint;\nbegin\n   flag:=true;\n\/\/ w[i,3]=-1 w[i,2]-w[i,1]&gt;0 -&gt;w[i,1]-w[i,2]&lt;0 -&gt;w[i,1]-w[i,2]&lt;=-1\n\/\/ w[i,3]&gt;-1 w[i,2]-w[i,1]=w[i,3] -&gt;w[i,2]-w[i,1]&lt;=w[i,3] w[i,1]-w[i,2]&lt;=-w[i,3]\n   for k:=1 to n+1 do\n   begin\n      flag:=true;\n      for i:=1 to m do\n      begin\n         if w[i,3]=-1 then\n         begin\n            relax(w[i,1],w[i,2],-1);\n         end\n         else\n         begin\n            relax(w[i,2],w[i,1],w[i,3]);\n            relax(w[i,1],w[i,2],-w[i,3]);\n         end;\n\n      end;\n      if flag then break;\n   end;\n\n   if flag then writeln('Reliable')\n   else writeln('Unreliable');\nend;\nbegin\n   while not seekeof do\n   begin\n      fillchar(d,sizeof(d),0);\n      readln(n,m);\n      for i:=1 to m do\n      begin\n         read(c);\n         if (c='p') or (c='P') then\n         begin\n            readln(w[i,1],w[i,2],w[i,3]);\n         end\n         else\n         begin\n            readln(w[i,1],w[i,2]);\n            w[i,3]:=-1;\n         end;\n\n      end;\n      bellman_ford;\n\n   end;\nend.<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5dee\u5206\u7ea6\u675f\u2026\u2026 Program p2983; var n,m,i,j,p:longint; c:char; fl [&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":[75],"class_list":["post-146","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-differential_restraint_system"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>POJ 2983(\u5dee\u5206\u7ea6\u675f-\u6709\u65e0\u89e3\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=146\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POJ 2983(\u5dee\u5206\u7ea6\u675f-\u6709\u65e0\u89e3\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"\u5dee\u5206\u7ea6\u675f\u2026\u2026 Program p2983; 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