{"id":236,"date":"2012-11-06T17:04:00","date_gmt":"2012-11-06T09:04:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/141"},"modified":"2012-11-06T17:04:00","modified_gmt":"2012-11-06T09:04:00","slug":"the_zoj_2527_the_longest_arithmetic_series","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=236","title":{"rendered":"ZOJ 2527(\u6700\u957f\u7b49\u5dee\u6570\u5217\uff09"},"content":{"rendered":"<p>\u968f\u4fbf\u7ed9\u4e00\u4e32\u6570\u5217\uff0c\u6c42\u6700\u957f\u7b49\u5dee\u6570\u5217<\/p>\n<p>3\u65b9\u6c34\u8fc7\uff0c\u56de\u5934\u9644n^2logn\u7b97\u6cd5 \uff08dp[i][j][k]=dp[i][k]&#43;1)<\/p>\n<p>\n<\/p>\n<\/p>\n<pre name=\"code\" class=\"cpp\">#include&lt;cstdio&gt;\n#include&lt;cstring&gt;\n#include&lt;cstdlib&gt;\n#include&lt;cmath&gt;\n#include&lt;cctype&gt;\n#include&lt;iostream&gt;\n#include&lt;functional&gt;\n#include&lt;algorithm&gt;\nusing namespace std;\n#define MAXN (10000+10)\nint n,a[MAXN];\nint main()\n{\n\twhile (scanf(&quot;%d&quot;,&amp;n)!=EOF)\n\t{\n\t\tfor (int i=1;i&lt;=n;i++) scanf(&quot;%d&quot;,&amp;a[i]);\n\t\tsort(a+1,a+1+n);\n\t\tint ans=2;\n\t\tfor (int i=1;i&lt;=n;i++)\n\t\t\tfor (int j=i+1;j&lt;=n;j++)\n\t\t\t{\n\t\t\t\tint dd=a[j]-a[i],now=j,tot=2;\n\t\t\t\tfor (int k=j+1;k&lt;=n;k++)\n\t\t\t\t{\n\t\t\t\t\tif (a[k]-a[now]==dd)\n\t\t\t\t\t{\n\t\t\t\t\t\ttot++;\n\t\t\t\t\t\tnow=k;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tans=max(ans,tot);\n\n\t\t\t}\n\t\tcout&lt;&lt;ans&lt;&lt;endl;\n\n\t}\n\n\n\n\treturn 0;\n}\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u968f\u4fbf\u7ed9\u4e00\u4e32\u6570\u5217\uff0c\u6c42\u6700\u957f\u7b49\u5dee\u6570\u5217 3\u65b9\u6c34\u8fc7\uff0c\u56de\u5934\u9644n^2logn\u7b97\u6cd5 \uff08dp[i][j][k]=dp[i][k] [&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":[81],"class_list":["post-236","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-series"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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