{"id":801,"date":"2013-08-15T02:24:08","date_gmt":"2013-08-14T18:24:08","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=801"},"modified":"2013-09-06T17:27:49","modified_gmt":"2013-09-06T09:27:49","slug":"srm-587","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/srm-587\/","title":{"rendered":"SRM 587"},"content":{"rendered":"<p><!--more--><\/p>\n<h2>550. TriangleXor<\/h2>\n<h3>Brief description: <\/h3>\n<p>\u3002\u3002\u3002\u6c42\u4e0b\u56fe\u6240\u793a Pattern \u7684\u9762\u79ef\u3002\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full\" src=\"https:\/\/apps.topcoder.com\/wiki\/download\/attachments\/108463636\/587d15001.svg\"><\/p>\n<h3>Analysis: <\/h3>\n<p>\u3002\u3002\u3002\u8fd9\u4e48\u7b80\u5355\u7684\u9898\u90fd\u6ca1\u8fc7\u3002\u3002\u3002\u739b\u5fb7\u3002\u3002\u6211\u662f <code>\uff0cb<\/code> \u4e48\uff1f\u3002\u3002\u3002<br \/>\n\u3002\u3002\u50cf\u4e0a\u56fe\u90a3\u6837\u5206\u4e09\u79cd\u60c5\u51b5\u8ba8\u8bba\u3002\u3002\u3002\u3002\u8bbe\u5bbd\u5ea6\u4e3a <code>w<\/code>\u3002\u3002\u90a3\u4e48\u6574\u4e2a\u77e9\u5f62\u7684\u9762\u79ef\u4e5f\u662f <code>w<\/code>\u3002\u3002\u3002\u3002\u4e0a\u9762\u90e8\u5206\u663e\u7136\u662f <code>w\/4<\/code>\u3002\u3002\uff1f\u3002\u3002<br \/>\n\u3002\u3002\u3002\u5de6\u8fb9\u90e8\u5206\u7684\u6bcf\u4e2a\u5c0f\u5757\u3002\u3002\u5c31\u662f\u5e95\u8fb9\u5728\u5de6\u4fa7\u7684\u76f8\u90bb\u7684\u4e24\u4e2a\u4e09\u89d2\u5f62\u9762\u79ef\u7684\u5dee\u3002\u3002\u5de6\u4fa7\u4e09\u89d2\u5f62\u7684\u9762\u79ef\u53c8\u53ea\u548c\u4e00\u6761\u5bf9\u89d2\u7ebf\u548c\u5bf9\u9762\u7684\u7b2c ith \u6761\u659c\u7ebf\u7684\u4ea4\u70b9\u7684\u6a2a\u5750\u6807\u6709\u5173\u3002\u3002<\/p>\n<p>\u3002\u3002\u3002\u800c\u8fd9\u4e24\u4e2a\u65b9\u7a0b\u663e\u7136\u5c31\u662f\u3002\u3002\u3002\u5c31\u662f\u3002\u3002\/$:o~o<\/p>\n<pre class=\"brush: cpp; light: false; title: ; toolbar: true; notranslate\" title=\"\">\r\nDB y(int i){return (DB)i\/(i+w);}\r\nDB x(int i){return y(i)*w;}\r\n<\/pre>\n<p>\u3002\u3002\u3002\u6700\u540e\u5e95\u4e0b\u4e00\u5806\u5e73\u884c\u56db\u8fb9\u5f62\u4e00\u884c\u4e00\u884c\u7684\u89e3\u51b3\u5c31\u884c\u4e86\u3002   \u3002\u3002\u3002\u3002\u3002\u3002<br \/>\n\u3002\u3002\u3002\uff08\u3002\u3002\u3002\u5e95\u4e0b\u56fe\u5f62\u7684\u6781\u9650\u3002\u3002\u662f <code>w\/8<\/code>\u3002\u3002\u3002\u5728\u672c\u9898\u4e2d\u4f60\u53d6 w\/8 \u4f5c\u4e3a\u8fd1\u4f3c\u503c\u4e5f\u662f\u53ef\u4ee5\u8fc7\u7684\u3002\u3002<img decoding=\"async\" src=\"https:\/\/www.shuizilong.com\/house\/wp-includes\/images\/smilies\/m\/Face_23.png\" alt=\"\/$:o~o\" class=\"wp-smiley\">\u3002\u3002\u3002\uff09<\/p>\n<pre class=\"brush: cpp; light: false; title: ; toolbar: true; notranslate\" title=\"\">\r\nDB w;\r\nDB y(int i){return (DB)i\/(i+w);}\r\nDB x(int i){return y(i)*w;}\r\n\r\nclass TriangleXor {\r\npublic:\r\n\tint theArea(int W) {\r\n\r\n        DB res = 0; w = W;\r\n\r\n        if (~W&amp;1) res += w\/4;\r\n\r\n        for (int i=1;i&lt;=W;i+=2){\r\n            res += x(i)-x(i-1);\r\n        }\r\n\r\n        \/\/res += w\/8;\r\n        for (int i=1;i&lt;=W;i+=2){\r\n            res += (W-2*x(i)) * (y(i+1)-y(i-1))\/2;\r\n        }\r\n\r\n\t\treturn res;\r\n\t}\r\n};\r\n<\/pre>\n<h2>900. ThreeColorability<\/h2>\n<h3>Brief description: <\/h3>\n<p>\u3002\u3002\u3002\u3002\u7ed9\u5b9a\u4e00\u4e2a\u8fb9\u957f\u4e3a n*m \u7684\u77e9\u5f62\u683c\u70b9\u3002\u3002<br \/>\n\u3002\u3002\u5bf9\u6bcf\u4e00\u4e2a\u5c0f\u77e9\u5f62\u6709\u4e00\u4e2a\u5bf9\u89d2\u7ebf\u7684\u8fde\u63a5\u65b9\u5f0f\u3002\u3002\u6709\u4e9b\u5df2\u7ecf\u786e\u5b9a\u3002\u3002\u6709\u4e9b\u6ca1\u6709\u3002<br \/>\n\u3002\u3002\u95ee\u662f\u5426\u5b58\u5728\u4e00\u79cd\u5bf9\u89d2\u7ebf\u7684\u8fde\u63a5\u65b9\u6848\u3002\u3002\u3002\u4f7f\u5f97\u683c\u70b9\u53ef\u4ee5\u4e09\u67d3\u8272\u3002\u3002\u5982\u679c\u5b58\u5728\u3002\u3002\u8f93\u51fa\u5b57\u5178\u5e8f\u6700\u5c0f\u7684\u89e3\u3002\u3002\u3002<\/p>\n<h3>Analysis: <\/h3>\n<p>\u3002\u3002\u3002Div 2 \u7684\u7248\u672c\u3002\u3002\u53ea\u6709\u5224\u5b9a\u95ee\u9898\u3002\u3002\u3002<br \/>\n\u3002\u3002\u3002\u3002\u3002\u53ea\u8981\u6ce8\u610f\u8ba9\u6240\u6709 2\u00d72 \u7684\u5b50\u683c\u70b9\u90fd\u5408\u6cd5\u5c31\u884c\u4e86\u3002\u3002\u3002\uff08\u5fc5\u8981\u6027\u663e\u7136\u3002\u3002\u5145\u5206\u6027\u53ef\u4ee5 yy \u51fa\u6765\u3002\u3002<img decoding=\"async\" src=\"https:\/\/www.shuizilong.com\/house\/wp-includes\/images\/smilies\/m\/Face_23.png\" alt=\"\/$:o~o\" class=\"wp-smiley\"><\/p>\n<p>\u5176\u5b9e\u5c31\u662f\u4e0b\u9762\u8fd9 8 \u79cd Pattern &#8230;<\/p>\n<pre>\r\n00 00 01 01\r\n00 11 01 10\r\n\r\n10 10 11 11\r\n01 10 00 11\r\n<\/pre>\n<p>\u4e8e\u662f\u8fd9\u4e2a\u6027\u8d28\u7b49\u4ef7\u4e8e\u6bcf\u4e00\u884c\u548c\u7b2c\u4e00\u884c\u8981\u4e48\u76f8\u540c\u8981\u4e48\u76f8\u53cd\u3002\u3002\u3002\uff08\u3002\u3002\u6216\u8005\u8bf4\u6210\u5217\u6ee1\u8db3\u8fd9\u4e2a\u6027\u8d28\u4e5f\u884c\u3002\u3002\u53cd\u6b63\u6ee1\u8db3\u884c\u7684\u5fc5\u7136\u4e5f\u6ee1\u8db3\u5217\u7684\u3002\u3002\u3002<br \/>\n\u3002\u3002\u3002\u4e8e\u662f\u53d8\u6210\u4e86\u4e00\u4e2a\u4e8c\u67d3\u8272\u95ee\u9898\u3002\u3002<img decoding=\"async\" src=\"https:\/\/www.shuizilong.com\/house\/wp-includes\/images\/smilies\/m\/Face_23.png\" alt=\"\/$:o~o\" class=\"wp-smiley\">\u3002\u3002\u3002\u5b57\u5178\u5e8f\u6700\u5c0f\u53ef\u4ee5\u901a\u8fc7\u9010\u683c\u679a\u4e3e\u7684\u65b9\u5f0f\u5f97\u5230\u3002\u3002<\/p>\n<h3>External link: <\/h3>\n<p><a href=\"https:\/\/apps.topcoder.com\/wiki\/display\/tc\/SRM+587\">https:\/\/apps.topcoder.com\/wiki\/display\/tc\/SRM+587<\/a><br \/>\n<a href=\"https:\/\/gist.github.com\/lychees\/6233770\">https:\/\/gist.github.com\/lychees\/6233770<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[17],"tags":[],"class_list":["post-801","post","type-post","status-publish","format-standard","hentry","category-topcoder"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-cV","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/801","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/comments?post=801"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/801\/revisions"}],"predecessor-version":[{"id":802,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/801\/revisions\/802"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}