{"id":479,"date":"2012-09-15T01:37:48","date_gmt":"2012-09-14T17:37:48","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=479"},"modified":"2012-09-28T17:17:39","modified_gmt":"2012-09-28T09:17:39","slug":"srm-555-2","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/srm-555-2\/","title":{"rendered":"SRM 555"},"content":{"rendered":"<h3>Brief description: <\/h3>\n<p>&#8230;1000\uff1a<br \/>\n\u3002\u7ed9\u5b9a\u4e00\u4e2a\u56fe\u7075\u673a\u3002\u3002\u95ee\u6309\u7167\u6307\u5b9a\u7684\u64cd\u4f5c\u5e8f\u5217\uff08\u957f\u5ea6 m\uff09\u6709\u591a\u5c11\u79cd\u521d\u59cb\u72b6\u6001\u53ef\u4ee5\u5230\u8fbe\u7ed9\u5b9a\u7684\u76ee\u6807\u72b6\u6001\u3002<br \/>\n\u3002\u3002\uff08\u4e0d\u8bba\u5b83\u7684\u521d\u59cb\u4f4d\u7f6e\u3002\u3002\u3002<br \/>\n<!--more--><\/p>\n<h3>Live: <\/h3>\n<p>255 [&#8230;\u9884\u5904\u7406\u751f\u6210\u957f\u5ea6 50 \u4ee5\u5185\u7684 5^k \u6a21\u5f0f\u4e32\u3002 \u66b4\u529b\u5339\u914d\u70b9\u4f4d\u7f6e DP ] .\u3002\u3002555 [.. \u679a\u4e3e\u884c\u4f7f\u7528\u7684\u884c\u6570 i\uff0c\u8ba1\u7b97\u51fa\u4e3a\u4e86\u5f97\u5230 s \u9700\u8981\u4f7f\u7528\u7684\u5217\u6570 j\uff0c\u7d2f\u8ba1 pow() * pow() * C() * C() \u3002\u3002\u3002]\u3002\u3002\u30021055 [&#8230;.] \u3002<br \/>\n&#8230;<\/p>\n<h3>Analysis: <\/h3>\n<p>555<br \/>\n\u3002\u3002 555 \u6700\u540e\u4e00\u6b65\u7684\u516c\u5f0f\u63a8\u7684\u4e0d\u5bf9\u3002\u3002\uff08\u4e24\u5904 pow() \u5e94\u8be5\u6362\u6210\u53ef\u91cd\u7ec4\u5408\u3002\u3002<br \/>\n&#8230; \u53e6\u5916\u5982\u679c\u8981\u4f7f\u7528 O(n) \u7b97\u6cd5\u7684\u8bdd\uff0c\u5bf9 i=n\/2 \uff08\u4e5f\u5c31\u662f\u5217\u4e0d\u4ea7\u751f\u8d21\u732e\u7684\u60c5\u51b5\uff0c\u8981\u7279\u5224\u3002\u3002\u3002<br \/>\n\uff08\u73b0\u573a\u751f\u7684\u8bdd\u76f4\u63a5\u7528 O(n2) \u5c31\u4e0d\u4f1a\u6709\u4e8b\u4e86\u3002\u3002\u3002Mark\u3002\u3002\u3002<\/p>\n<p>1000<br \/>\n\u3002\u3002\u9996\u5148\u786e\u8ba4\u4f7f\u7528\u5bb9\u65a5\u539f\u7406\u3002\u4f46\u662f\u590d\u6742\u5ea6\u5927\u6982\u4f1a\u8fc7\u9ad8\u3002\u3002\u4e4b\u540e\u6ce8\u610f\u5230\u6709\u4e00\u4e2a\u4e0d\u81ea\u7136\u7684\u6761\u4ef6\uff1a<br \/>\n\u201cIt is not allowed for the head to leave the tape (i.e., move left from the leftmost cell or right from the rightmost one). Should that happen, the player loses &#8212; even if the goal has been reached before the head left the tape.\u201d<br \/>\n\u3002\u3002\u3002\u731c\u6d4b\u4f7f\u7528\u8fd9\u4e2a\u6761\u4ef6\u8fdb\u884c\u526a\u679d\u3002\u3002\u90a3\u4e48\u6b65\u9aa4\u662f\u3002<\/p>\n<p>\u9996\u5148\u626b\u63cf\u4e00\u904d\u64cd\u4f5c\u5e8f\u5217\u5f97\u51fa\u6c42\u51fa\u6700\u5927\u7684\u76f8\u5bf9\u4f4d\u79fb\u3002\u3002\u8bb0\u505a nn\u3002\uff08\u540e\u9762\u8981\u7528\u8fd9\u4e2a\u91cf\u526a\u679d\u3002\u3002<br \/>\n\u3002\u3002\u4ee5\u53ca\u5408\u6cd5\u521d\u59cb\u4f4d\u7f6e\u7684\u8303\u56f4 l, r\u3002( n \u8bb0\u505a r &#8211; l\u3002\u3002\u3002<\/p>\n<p>\u8003\u5bdf\u5177\u4f53\u7684\u4e00\u4e2a\u4f4d\u7f6e x \u3002\u3002\u7531\u4e8e\u4e4b\u524d\u5df2\u7ecf\u5224\u65ad\u4e86\u8d8a\u754c\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u73b0\u5728\u53ea\u8981\u5728\u4e2d\u95f4\u4efb\u610f\u4e00\u4e2a\u8fc7\u7a0b\u5408\u6cd5\u5c31\u8981\u7eb3\u5165\u7edf\u8ba1\u3002\u3002<br \/>\n\u8003\u5bdf\u64cd\u4f5c\u5bf9\u6bcf\u4e2a\u4f4d\u7f6e\u7684\u5f71\u54cd\uff0c\u6709\u4e09\u79cd\u60c5\u51b5\u3002\u3002\u672a\u4ea7\u751f\u8fc7\u5f71\u54cd\u3002\u3002\u4fee\u6539\u4e86\u8fd9\u4e2a\u4f4d\u7f6e\u4e14\u5408\u6cd5\u3002\u3002\u4fee\u6539\u4e86\u8fd9\u4e2a\u4f4d\u7f6e\u4f46\u662f\u4e0d\u5408\u6cd5\u3002\u3002\u3002<br \/>\n\u6700\u540e\u8005\u53ea\u8981\u51fa\u73b0\u4e00\u4e2a\u5219\u8df3\u8fc7\u3002\u3002\u7ee7\u7eed\u8fdb\u884c\u540e\u7eed\u7684\u626b\u63cf\u3002\u3002\u524d\u8005\u521d\u59cb\u4f4d\u7f6e\u7684\u72b6\u6001\u662f\u56fa\u5b9a\u7684\u3002\u3002\u4e0d\u8c08\u3002\u3002\u4e2d\u95f4\u8fd9\u79cd\u4f1a\u4ea7\u751f\u4e00\u4e2a2\u500d\u7684\u56e0\u5b50\u3002\u3002\u3002\u3002\u3002<\/p>\n<p>\u3002\u3002\u3002\u76f4\u63a5\u5e94\u7528\u5bb9\u65a5\u5b9a\u7406 O(2^n*n)\u3002\u3002\u3002\u4e4b\u540e\u6ce8\u610f\u5230\u76f8\u9694\u592a\u8fdc\u7684\u72b6\u6001\u4e4b\u95f4\u4e0d\u53ef\u80fd\u4ea7\u751f\u4ea4\u96c6\u7684\u53ef\u4ee5\u8df3\u8fc7\u3002\u3002\uff08\u3002\u6ce8\u610f\u8df3\u8fc7\u7684\u90e8\u5206\u4ecd\u7136\u53ef\u80fd\u6709\u5e73\u51e1\u89e3\u3002\uff01\u3002\u3002\uff08\u521d\u59cb\u72b6\u6001\u7b49\u4e8e\u76ee\u6807\u72b6\u6001\u3002\u3002<\/p>\n<p><a href=\"http:\/\/paste.ubuntu.com\/1206232\/\">255.\u3002\u3002\uff08\u5b57\u7b26\u4e32\uff0cDP\u3002<\/a><br \/>\n<a href=\"http:\/\/paste.ubuntu.com\/1206234\/\">\u3002\u3002555.\u3002\uff08\u7ec4\u5408\u3002\u3002<\/a><br \/>\n<a href=\"http:\/\/paste.ubuntu.com\/1247158\/\">1055.\u3002\uff08\u5bb9\u65a5\u539f\u7406 + \u526a\u679d\u3002\u3002<\/a><\/p>\n<h3>External link: <\/h3>\n<p>&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Brief description: &#8230;1000\uff1a \u3002\u7ed9\u5b9a\u4e00\u4e2a\u56fe\u7075\u673a\u3002\u3002\u95ee\u6309\u7167\u6307\u5b9a\u7684\u64cd\u4f5c\u5e8f\u5217\uff08\u957f\u5ea6 m\uff09\u6709\u591a\u5c11\u79cd\u521d\u59cb\u72b6\u6001\u53ef\u4ee5\u5230\u8fbe\u7ed9\u5b9a\u7684\u76ee\u6807\u72b6\u6001\u3002 \u3002\u3002\uff08\u4e0d\u8bba\u5b83\u7684\u521d\u59cb\u4f4d\u7f6e\u3002\u3002\u3002<\/p>\n","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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[17],"tags":[],"class_list":["post-479","post","type-post","status-publish","format-standard","hentry","category-topcoder"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-7J","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/479","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=479"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/479\/revisions"}],"predecessor-version":[{"id":482,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/479\/revisions\/482"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}