{"id":145,"date":"2012-08-16T17:17:00","date_gmt":"2012-08-16T09:17:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/33"},"modified":"2012-08-16T17:17:00","modified_gmt":"2012-08-16T09:17:00","slug":"poj_1201_differential_constraints","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=145","title":{"rendered":"POJ 1201 \uff08\u5dee\u5206\u7ea6\u675f\uff09"},"content":{"rendered":"<p>1176 \u52a0\u6743\u7248&nbsp;<\/p>\n<p>\u2026\u2026\u8fd8\u662f\u5dee\u5206\u7ea6\u675f<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program P1201;\nvar\n   n,i,j,minq,maxq:longint;\n   d:array[-1..60000] of longint;\n   w:array[1..60000,1..3] of longint;\n   flag:boolean;\nfunction min(a,b:longint):longint;\nbegin\n   if a&lt;b then exit(a) else exit(b);\nend;\nfunction max(a,b:longint):longint;\nbegin\n   if a&gt;b then exit(a) else exit(b);\nend;\n\nprocedure relax(v,u,w:longint);\nbegin\n   if (d[u]+w&lt;d[v]) 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   \/\/d[w[i,2]] - d[w[i,1]-1]&gt;=2 -&gt;d[w[i,1]-1]-d[w[i,2]]&lt;=-2\n   \/\/d[i]-d[i-1]&lt;=1\n   \/\/d[i]-d[i-1]&gt;=0 -&gt;d[i-1]-d[i]&lt;=0\n\n   d[minq-1]:=0;\n   while (true) do\n   begin\n      flag:=true;\n\/\/    for i:=minq to maxq do relax(i,minq-1,0);\n      for i:=1 to n do relax(w[i,1]-1,w[i,2],-w[i,3]);\n      for i:=minq to maxq do relax(i,i-1,1);\n      for i:=maxq downto minq do relax(i-1,i,0);\n      if flag then break;\n   end;\nend;\nbegin\n   while not seekeof do\n   begin\n      minq:=maxlongint;  maxq:=0;\n      fillchar(d,sizeof(d),0);\n      read(n);\n      for i:=1 to n do\n      begin\n         read(w[i,1],w[i,2],w[i,3]);\n         minq:=min(minq,w[i,1]);\n         maxq:=max(maxq,w[i,2]);\n      end;\n      bellman_ford;\n      writeln(d[maxq]-d[minq-1]);\n   end;\nend.\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1176 \u52a0\u6743\u7248&nbsp; \u2026\u2026\u8fd8\u662f\u5dee\u5206\u7ea6\u675f Program P1201; var n,i,j,minq,m [&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-145","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 1201 \uff08\u5dee\u5206\u7ea6\u675f\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=145\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POJ 1201 \uff08\u5dee\u5206\u7ea6\u675f\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"1176 \u52a0\u6743\u7248&nbsp; 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