{"id":148,"date":"2012-08-16T22:11:00","date_gmt":"2012-08-16T14:11:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/36"},"modified":"2012-08-16T22:11:00","modified_gmt":"2012-08-16T14:11:00","slug":"poj_1328_greedy","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=148","title":{"rendered":"POJ 1328\uff08\u8d2a\u5fc3\uff09"},"content":{"rendered":"<p>\u8d2a\u5fc3\uff0c\u533a\u95f4\u6392\u5e8f<\/p>\n<p>\n<\/p>\n<p>\u5982\u679c\u533a\u95f4\u5305\u542b \u7565\u8fc7\uff0c\u5426\u5219\u7b54\u6848&#43;1\uff1b<\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"delphi\">Program P1328;\nvar\n   n,d,i,j,k,ans:longint;\n   x:double;\n   tag:boolean;\n   map:array[1..1000,1..2] of double;\nprocedure qsort(l,r:longint);\nvar\n   i,j:longint;\n   m,p:double;\nbegin\n   i:=l;\n   j:=r;\n   m:=map[(l+r) div 2,1];\n   repeat\n      while map[i,1]&lt;m do inc(i);\n      while map[j,1]&gt;m do dec(j);\n      if i&lt;=j then\n      begin\n         p:=map[i,1];\n         map[i,1]:=map[j,1];\n         map[j,1]:=p;\n         p:=map[i,2];\n         map[i,2]:=map[j,2];\n         map[j,2]:=p;\n         inc(i);\n         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);\nend;\nbegin\n   i:=1;\n{   assign(input,'P1328.in');\n   assign(output,'P1328.out');\n   reset(input);\n   rewrite(output);   }\n   while not seekeof do\n   begin\n      tag:=true;\n      read(n,d);\n      if d&lt;=0 then tag:=false;\n      if (n=0) and (d=0) then break;\n      j:=1;\n      for k:=1 to n do\n      begin\n         read(map[j,1],map[j,2]);\n         if map[j,2]&lt;0  then continue;\n         if d&lt;map[j,2] then continue;\n         x:=sqrt(d*d-map[j,2]*map[j,2]);\n         map[j,2]:=map[j,1]+x;\n         map[j,1]:=map[j,1]-x;\n         inc(j);\n      end;\n      dec(j);\n      if tag and (j=n) then\n      begin\n         qsort(1,j);\n         ans:=1;\n         x:=map[1,2];\n         for k:=2 to j do\n         begin\n            if (map[k,2]&lt;x) then\n            begin\n               x:=map[k,2];\n            end\n            else if (x&lt;map[k,1]) then\n            begin\n               inc(ans);\n               x:=map[k,2];\n            end;\n\n         end;\n\n         writeln('Case ',i,': ',ans);\n      end\n      else writeln('Case ',i,': -1');\n      inc(i);\n   end;\n {  close(input);\n   close(output);   }\nend.\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8d2a\u5fc3\uff0c\u533a\u95f4\u6392\u5e8f \u5982\u679c\u533a\u95f4\u5305\u542b \u7565\u8fc7\uff0c\u5426\u5219\u7b54\u6848&#43;1\uff1b Program P1328; var n,d,i, [&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":[118],"class_list":["post-148","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-greedy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>POJ 1328\uff08\u8d2a\u5fc3\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=148\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POJ 1328\uff08\u8d2a\u5fc3\uff09 - nike0good\" \/>\n<meta property=\"og:description\" content=\"\u8d2a\u5fc3\uff0c\u533a\u95f4\u6392\u5e8f \u5982\u679c\u533a\u95f4\u5305\u542b \u7565\u8fc7\uff0c\u5426\u5219\u7b54\u6848&#043;1\uff1b Program P1328; 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