{"id":141,"date":"2012-08-15T21:20:00","date_gmt":"2012-08-15T13:20:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/29"},"modified":"2012-08-15T21:20:00","modified_gmt":"2012-08-15T13:20:00","slug":"poj_1325_2_matches","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=141","title":{"rendered":"POJ 1325(2\u90e8\u56fe\u5339\u914d\uff09"},"content":{"rendered":"<p>2\u90e8\u56fe\u5339\u914d\uff0c\u4e0d\u80fd\u8003\u86510<\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program P1325;\nvar\n   n,m,k,i,j:longint;\n   p,x,y,level:longint;\n   map,f,list:array[-1..300,-1..300] of longint;\n   d,e:array[-1..300] of longint;\n   queue:array[1..300] of longint;\n   b:array[-1..300] of 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 dijstra;\nvar\n   h,t,i:longint;\nbegin\n   fillchar(d,sizeof(d),0);\n   fillchar(queue,sizeof(queue),0);\n   fillchar(b,sizeof(b),false);\n   queue[1]:=n+m;\n   b[n+m]:=true;\n   h:=1;\n   t:=1;\n   while h&lt;=t do\n   begin\n      for i:=-1 to n+m-1 do\n      begin\n         if (map[i,queue[h]]&gt;0) then\n            if (not(b[i])) then\n         begin\n            inc(t);\n            queue[t]:=i;\n            b[i]:=true;\n            d[i]:=d[queue[h]]+1;\n         end;\n      end;\n      inc(h);\n   end;\n   d[-1]:=n+m+2+1;\nend;\nprocedure push(i,j:longint);\nvar\n   flow:longint;\nbegin\n   flow:=min(e[i],map[i,j]-f[i,j]);\n\n   if (e[j]=0) and (j&gt;-1) and (j&lt;n+m) then\n   begin\n      inc(list[d[j],0]);\n      list[d[j],list[d[j],0]]:=j;\n      level:=max(level,d[j]);\n   end;\n\n   dec(e[i],flow);\n   inc(e[j],flow);\n   inc(f[i,j],flow);\n   f[j,i]:=-f[i,j];\n\nend;\nprocedure relable(i:longint);\nvar\n   j,minj:longint;\nbegin\n   minj:=maxlongint;\n   for j:=-1 to n+m do\n      if (map[i,j]-f[i,j]&gt;0) and (b[j]) then minj:=min(minj,d[j]);\n   d[i]:=minj+1;\n\n   level:=d[i];\n   inc(list[level,0]);\n   list[level,1]:=i;\nend;\nProcedure hllp;\nvar\n   i,j,flow:longint;\nbegin\n   dijstra;\n\n   level:=0;\n   for i:=0 to n-1 do\n      if b[i] then\n      begin\n         e[i]:=1;\n         f[-1,i]:=1;\n         f[i,-1]:=-1;\n\n\n         inc(list[d[i],0]);\n         list[d[i],list[d[i],0]]:=i;\n         level:=max(level,d[i]);\n      end;\n   while (level&gt;0) do\n   begin\n      i:=list[level,list[level,0]];\n      dec(list[level,0]);\n      while (level&gt;0) and (list[level,0]=0) do dec(level);\n\n      for j:=-1 to n+m do\n         if (d[i]=d[j]+1) and (map[i,j]-f[i,j]&gt;0) and (b[j]) then\n         begin\n            push(i,j);\n\n            if e[i]=0 then break;\n         end;\n      if e[i]&gt;0 then relable(i);\n\n   end;\n\nend;\nbegin\n   read(n);\n   while (n&gt;0) do\n   begin\n      fillchar(list,sizeof(list),0);\n      fillchar(e,sizeof(e),0);\n      fillchar(f,sizeof(f),0);\n\n      read(m,k);\n      fillchar(map,sizeof(map),0);\n      for i:=1 to k do\n      begin\n         read(p,x,y);\n         if (x=0) or (y=0) then continue;\n         map[x,n+y]:=1;\n      end;\n      for i:=0 to n-1 do map[-1,i]:=1;\n      for i:=n to n+m-1 do map[i,n+m]:=1;\n      hllp;\n      writeln(e[n+m]);\n\n      read(n);\n\n   end;\nend.<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2\u90e8\u56fe\u5339\u914d\uff0c\u4e0d\u80fd\u8003\u86510 Program P1325; var n,m,k,i,j:longint; p,x,y [&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":[113],"class_list":["post-141","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-network_flow"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>POJ 1325(2\u90e8\u56fe\u5339\u914d\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=141\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POJ 1325(2\u90e8\u56fe\u5339\u914d\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"2\u90e8\u56fe\u5339\u914d\uff0c\u4e0d\u80fd\u8003\u86510 Program P1325; 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