{"id":631,"date":"2013-01-16T15:56:19","date_gmt":"2013-01-16T07:56:19","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=631"},"modified":"2014-10-03T14:50:58","modified_gmt":"2014-10-03T06:50:58","slug":"bzoj-2809-apio2012dispatching","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/bzoj-2809-apio2012dispatching\/","title":{"rendered":"BZOJ 2809: [Apio2012]dispatching"},"content":{"rendered":"

Brief description: <\/h3>\n

\u3002\u3002\u7ed9\u5b9a\u4e00\u9897 N \u4e2a\u8282\u70b9\u7684\u6811\uff0c\u603b\u8d44\u91d1 M\u3002\u3002\u3002\u5bf9\u6bcf\u4e2a\u8282\u70b9\u6709\u4e24\u4e2a\u53c2\u6570 C_u\uff08\u4ee3\u4ef7\uff09, L_u\uff08\u6536\u76ca\u56e0\u5b50\uff09\u3002\u3002
\n\u3002\u3002\u5bf9\u4e8e\u4e00\u9897\u4ee5 u \u4e3a\u6839\u7684\u5b50\u6811\u3002\u3002\u4f60\u53ef\u4ee5\u9009\u62e9\u4e00\u7ec4\u70b9\u96c6 S\u3002\u3002\u4f7f\u5f97\u70b9\u96c6\u7684\u4ee3\u4ef7\u548c\u4e0d\u8d85\u8fc7 M\u3002\u3002\u5219\u5e26\u6765\u7684\u6536\u76ca\u662f L_u |S|\u3002\u3002
\n\u3002\u3002\u6700\u5927\u5316\u6536\u76ca\u3002\u3002\u3002
\n<\/p>\n

Analysis: <\/h3>\n

…<\/p>\n

\u7b97\u6cd5\u4e00\uff1a\u5e73\u8861\u6811\u542f\u53d1\u5f0f\u5408\u5e76
\n\u3002\u3002\u8d2a\u5fc3\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u70b9\u4e3a\u6839\u7684\u5b50\u6811\uff0c\u6211\u4eec\u9700\u8981\u77e5\u9053\u5176\u5b50\u6811\u4e2d\uff0c\u524d k \u5c0f\u7684\u7ed3\u70b9\u5206\u522b\u662f\u591a\u5c11\u3002\u3002
\n\u90a3\u4e48\u6700\u666e\u901a\u7684\u505a\u6cd5\u662f\u5e73\u8861\u6811\u542f\u53d1\u5f0f\u5408\u5e76\u3002\u3002<\/p>\n

https:\/\/gist.github.com\/lychees\/ed2b51f66fa60305ac8d<\/a><\/p>\n

\u7b97\u6cd5\u4e8c\uff1a\u66b4\u529b + \u8def\u5f84\u538b\u7f29<\/p>\n

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\n\uff08\u867d\u7136\u6700\u574f\u60c5\u51b5\u4e0b\u8fd8\u662f\u4f1a\u9000\u5316\u6210 O(n2)\u3002 m \u7279\u522b\u5927\u3002\u3002\u4f7f\u5f97\u8def\u5f84\u538b\u7f29\u4e0d\u4f1a\u53d1\u751f\u3002\u3002\u3002\u3002\u4f46\u662f\u5c45\u7136\u53ef\u4ee5 AC\uff1f\uff09
\n\uff08\u8def\u5f84\u538b\u7f29\u3002\u30023400ms+ <\/p>\n

\r\n\/}\/* .................................................................................................................................. *\/\r\n\r\nconst int N = int(1e5) + 9;\r\n\r\nint p[N], c[N], l[N], o[N], s[N]; LL f[N];\r\nint n; LL m, ans;\r\n\r\nvoid gao(int x){\r\n    int r = c[x];\r\n    while (x){\r\n        if (r + f[x] <= m) f[x] += r, ++s[x];\r\n        else p[x] = p[p[x]];\r\n        x = p[x];\r\n    }\r\n}\r\n\r\nbool cmp(int a, int b){\r\n    return c[a] < c[b];\r\n}\r\n\r\nint main(){\r\n\r\n#ifndef ONLINE_JUDGE\r\n    freopen("in.txt", "r", stdin);\r\n    \/\/freopen("out.txt", "w", stdout);\r\n#endif\r\n\r\n    RD(n, m); REP_1(i, n) RD(p[i], c[i], l[i]), o[i] = i;\r\n    sort(o+1, o+1+n, cmp); REP_1(i, n) gao(o[i]);\r\n    REP_1(i, n) checkMax(ans, (LL) l[i] * s[i]);\r\n    OT(ans);\r\n}\r\n\r\n<\/pre>\n
\u7b97\u6cd5\u4e09\uff1a\u5de6\u504f\u6811\uff1f
\nhttp:\/\/www.cnblogs.com\/jianglangcaijin\/p\/3458158.html
\n\u7b97\u6cd5\u56db\uff1a\u4e3b\u5e2d\u6811
\nhttp:\/\/hi.baidu.com\/greencloud\/item\/a0f0903b2148bfcb2e8ec2d3<\/p>\n
External link: <\/h3>\n
http:\/\/www.lydsy.com\/JudgeOnline\/problem.php?id=2809<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Brief description: \u3002\u3002\u7ed9\u5b9a\u4e00\u9897 N \u4e2a\u8282\u70b9\u7684\u6811\uff0c\u603b\u8d44\u91d1 M\u3002\u3002\u3002\u5bf9\u6bcf\u4e2a\u8282\u70b9\u6709\u4e24\u4e2a\u53c2\u6570 C_u\uff08\u4ee3\u4ef7\uff09, L_u\uff08\u6536\u76ca\u56e0\u5b50\uff09\u3002\u3002 \u3002\u3002\u5bf9\u4e8e\u4e00\u9897\u4ee5 u \u4e3a\u6839\u7684\u5b50\u6811\u3002\u3002\u4f60\u53ef\u4ee5\u9009\u62e9\u4e00\u7ec4\u70b9\u96c6 S\u3002\u3002\u4f7f\u5f97\u70b9\u96c6\u7684\u4ee3\u4ef7\u548c\u4e0d\u8d85\u8fc7 M\u3002\u3002\u5219\u5e26\u6765\u7684\u6536\u76ca\u662f L_u |S|\u3002\u3002 \u3002\u3002\u6700\u5927\u5316\u6536\u76ca\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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[22],"tags":[],"class_list":["post-631","post","type-post","status-publish","format-standard","hentry","category-bzoj"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-ab","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/631","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=631"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/631\/revisions"}],"predecessor-version":[{"id":632,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/631\/revisions\/632"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}