{"id":1064,"date":"2014-11-07T03:48:58","date_gmt":"2014-11-06T19:48:58","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=1064"},"modified":"2014-11-14T17:32:20","modified_gmt":"2014-11-14T09:32:20","slug":"codeforces-round-232","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/codeforces-round-232\/","title":{"rendered":"Codeforces Round #232"},"content":{"rendered":"<p><a href=\"http:\/\/codeforces.com\/contest\/396\">http:\/\/codeforces.com\/contest\/396<\/a><br \/>\n<a href=\"http:\/\/user.qzone.qq.com\/251815992\/blog\/1393572631\">http:\/\/user.qzone.qq.com\/251815992\/blog\/1393572631<\/a><\/p>\n<h2>Problem A. On Number of Decompositions into Multipliers<\/h2>\n<h3>Brief description: <\/h3>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u6570\uff0c\u95ee\u5206\u62c6\u6210 n \u4e2a\u6574\u6570\u4e58\u79ef\u7684\u65b9\u6848\u6709\u591a\u5c11\u79cd\u3002<\/p>\n<h3>Analysis: <\/h3>\n<p>\u3002\u3002\u6bcf\u4e2a\u7d20\u56e0\u5b50\u662f\u72ec\u7acb\u7684\u3002\u3002\u4e58\u6cd5\u539f\u7406\u3002\u3002<br \/>\n\u8003\u5bdf\u67d0\u4e2a\u7d20\u56e0\u5b50\uff0c\u5047\u8bbe\u51fa\u73b0\u4e86 m \u6b21\u3002\u3002\u90a3\u4e48\u5c31\u662f\u5c06 m \u4e2a\u7403\u653e\u8fdb n \u4e2a\u76d2\u5b50\u4e2d\u7684\u65b9\u6848\u6570\u3002\u3002\u3002<br \/>\n\u9694\u677f\u6cd5\u5373\u53ef\u3002<\/p>\n<p><!--more--><\/p>\n<h2>Problem B. On Sum of Fractions<\/h2>\n<h3>Brief description: <\/h3>\n<p>\u3002\u3002<\/p>\n<h3>Analysis: <\/h3>\n<p>\u88c2\u9879\u3002<\/p>\n<h2>Problem C. On Changing Tree<\/h2>\n<h3>Brief description: <\/h3>\n<p>\u7ed9\u51fa\u4e00\u68f5\u6709\u6839\u6811\uff0c\u652f\u6301\u4ee5\u4e0b\u4e24\u79cd\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>1 u a k\uff1a\u8868\u793a\u5bf9\u4ee5 u \u4e3a\u6839\u7684\u5b50\u6811\uff0c\u5bf9\u6bcf\u4e2a\u7ed3\u70b9\u6dfb\u52a0 a-dk\uff0c\u5176\u4e2d d \u662f\u8be5\u7ed3\u70b9\u4e0e v \u7684\u8ddd\u79bb\u3002<\/li>\n<li>2 u\uff1a\u67e5\u8be2\u8282\u70b9 v \u7684\u503c\u3002<\/li>\n<\/ul>\n<h3>Analysis: <\/h3>\n<p>\u3002\u5982\u679c d = 0\u3002\u3002\u90a3\u4e48\u663e\u7136\u5c31\u662f\u3002\u3002<br \/>\n<a href=\"https:\/\/www.shuizilong.com\/house\/archives\/poj-3321-apple-tree\/\">https:\/\/www.shuizilong.com\/house\/archives\/poj-3321-apple-tree\/<\/a><\/p>\n<p>\u8fd9\u91cc\u6211\u4eec\u53ea\u9700\u8981\u7ef4\u62a4\u4e24\u4e2a\u6811\u72b6\u6570\u7ec4 c1, c2<br \/>\n\u6bcf\u6b21\u4fee\u6539\u65f6\u3002\u3002<br \/>\n\u3002\u3002\u5bf9 c1 += a \uff0cc2 += d\u3002\u3002\u3002<br \/>\n\u8be2\u95ee\u65f6\u8fd4\u56de c1 &#8211; dep[v]*c2 \u3002\u3002\u3002<br \/>\n\uff08\u8fd9\u6837\u4f1a\u591a\u51cf\u53bb\u4e00\u70b9\u3002\u3002\u518d\u4ece c1 \u91cc\u52a0\u4e0a\u3002\u3002\u3002\uff09<\/p>\n<p><a href=\"http:\/\/codeforces.com\/contest\/396\/submission\/5971492\">http:\/\/codeforces.com\/contest\/396\/submission\/5971492<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>http:\/\/codeforces.com\/contest\/396 http:\/\/user.qzone.qq.com\/251815992\/blog\/1393572631 Problem A. On Number of Decompositions into Multipliers Brief description: \u7ed9\u5b9a\u4e00\u4e2a\u6570\uff0c\u95ee\u5206\u62c6\u6210 n \u4e2a\u6574\u6570\u4e58\u79ef\u7684\u65b9\u6848\u6709\u591a\u5c11\u79cd\u3002 Analysis: \u3002\u3002\u6bcf\u4e2a\u7d20\u56e0\u5b50\u662f\u72ec\u7acb\u7684\u3002\u3002\u4e58\u6cd5\u539f\u7406\u3002\u3002 \u8003\u5bdf\u67d0\u4e2a\u7d20\u56e0\u5b50\uff0c\u5047\u8bbe\u51fa\u73b0\u4e86 m \u6b21\u3002\u3002\u90a3\u4e48\u5c31\u662f\u5c06 m \u4e2a\u7403\u653e\u8fdb n \u4e2a\u76d2\u5b50\u4e2d\u7684\u65b9\u6848\u6570\u3002\u3002\u3002 \u9694\u677f\u6cd5\u5373\u53ef\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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[1],"tags":[],"class_list":["post-1064","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-ha","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1064","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=1064"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1064\/revisions"}],"predecessor-version":[{"id":1065,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1064\/revisions\/1065"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=1064"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=1064"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=1064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}