{"id":82,"date":"2012-09-15T22:52:00","date_gmt":"2012-09-15T14:52:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/82"},"modified":"2012-09-15T22:52:00","modified_gmt":"2012-09-15T14:52:00","slug":"poj_1952_the_longest_decline_in_the_number_of_sub-sequence","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=82","title":{"rendered":"POJ 1952\uff08\u6700\u957f\u4e0d\u4e0b\u964d\u5b50\u5e8f\u5217\u7684\u4e2a\u6570\uff09"},"content":{"rendered":"<p>\u6c42\u4e00\u4e2a\u5e8f\u5217\u7684\u6700\u957f\u4e0d\u4e0b\u964d\u5b50\u5e8f\u5217\u7684\u957f\u5ea6\uff0c\u4e0e\u4e2a\u6570\uff08\u76f8\u540c\u6570\u5217\u7b971\u4e2a\uff09<\/p>\n<p>\u5173\u952e\u662f\u5982\u4f55\u5224\u91cd\u3002<\/p>\n<p>\u663e\u7136\u5982\u679c\u4e4b\u524d\u6709\u4e00\u4e2a\u5c3e\u6570\u76f8\u540c\u4e14\u957f\u5ea6\u76f8\u540c\u7684\u5e8f\u5217\uff0c\u54ea\u4e48\u540e\u4e00\u4e2a\u5305\u542b\u524d\u4e00\u4e2a\u6240\u6709\u53ef\u80fd\u7684\u5e8f\u5217\u76f8\u540c\u7684\u5e8f\u5217\uff0c\u6545\u5c06\u524d\u4e00\u4e2a\u5e8f\u5217\u5220\u9664\uff08\u91cd\u590d)<\/p>\n<p>\n<\/p>\n<\/p>\n<pre name=\"code\" class=\"delphi\">Program P1952;\nvar\n   n,i,j,ans:longint;\n   a,len,f,path:array[1..5000] of longint;\nbegin\n   read(n);\n   for i:=1 to n do read(a[i]);\n   for i:=1 to n do\n   begin\n      len[i]:=1;\n      f[i]:=1;\n      path[i]:=i;\n      for j:=i-1 downto 1 do\n         if (a[j]&gt;a[i]) and (len[j]+1&gt;len[i]) then\n         begin\n            len[i]:=len[j]+1;\n            f[i]:=f[j];\n         end\n         else if (a[j]&gt;a[i]) and (len[j]+1=len[i]) then inc(f[i],f[j]);\n\n\n      for j:=1 to i-1 do\n         if (a[i]=a[j]) and (len[i]=len[j]) then f[j]:=0;\n\n\n\n   end;\n   j:=0;\n   for i:=1 to n do if len[i]&gt;j then j:=len[i];\n   ans:=0;\n   for i:=1 to n do if len[i]=j then inc(ans,f[i]);\n\n   writeln(j,' ',ans);\n\n\nend.<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6c42\u4e00\u4e2a\u5e8f\u5217\u7684\u6700\u957f\u4e0d\u4e0b\u964d\u5b50\u5e8f\u5217\u7684\u957f\u5ea6\uff0c\u4e0e\u4e2a\u6570\uff08\u76f8\u540c\u6570\u5217\u7b971\u4e2a\uff09 \u5173\u952e\u662f\u5982\u4f55\u5224\u91cd\u3002 \u663e\u7136\u5982\u679c\u4e4b\u524d\u6709\u4e00\u4e2a\u5c3e\u6570\u76f8\u540c\u4e14\u957f [&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":[82],"class_list":["post-82","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-number_theory"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - 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