{"id":113,"date":"2010-08-29T08:28:29","date_gmt":"2010-08-29T00:28:29","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=113"},"modified":"2012-03-03T08:28:41","modified_gmt":"2012-03-03T00:28:41","slug":"hoj-2631-training-of-lord-fishs-fan-ii","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/hoj-2631-training-of-lord-fishs-fan-ii\/","title":{"rendered":"HOJ 2631. Training of Lord Fish&#8217;s Fan II"},"content":{"rendered":"<h3>Brief description :<\/h3>\n<p>  \u5361\u641c\u7d22\uff0c\u5361DP\u76840\/1\u80cc\u5305\u95ee\u9898\u3002<br \/>\n  (N<=30, M<=1,000,000,000)\n<!--more--><\/p>\n<h3>Analyse :<\/h3>\n<p>\u51cf\u534a\u5408\u5e76\uff0c<a href=\"https:\/\/www.shuizilong.com\/house\/archives\/1406\">\u53c2\u89c1\u524d\u6587<\/a>\uff0c\u76f8\u6bd4\u5b50\u96c6\u548c\u95ee\u9898\uff0c0\/1\u80cc\u5305\u62fc\u7b54\u6848\u7684\u65f6\u5019\u8981\u5f00\u4e24\u4e2a\u6307\u9488\uff0c<br \/>\n\u4e00\u5934\u4e00\u5c3e\u5411\u4e2d\u95f4\u626b\u63cf\uff0c\u53e6\u5916\u9700\u8981\u6ce8\u610f\u7684\u5219\u662f merge() \u524d\u7684\u4e00\u6bb5\u3002<\/p>\n<pre lang=\"cpp\" file=\"HOJ_2631.cpp\">\r\n\/*\r\n    Author: xiaodao\r\n    Prog: HOJ 2631. Training of Lord Fish's Fan II\r\n    Status: Accepted\r\n    Last modifiy: GMT +8 Aug. 28th 10:29\r\n*\/\r\n\r\n#include <iostream>\r\n#include <map>\r\nusing namespace std;\r\nconst int N = 30;\r\nmap<int, int> h1, h2;\r\nint C[N], V[N]; \/\/cost value\r\nint n, m, step, ans;\r\n \r\n       \/\/ depth, cost, value, hash pointer..\r\nvoid dfs(int k, int c, int v, map<int, int> &h){\r\n    if (c>m) return;\r\n    if (k==step) h = max(h, v);\r\n    else{\r\n        dfs(k+1, c+C[k], v+V[k], h);\r\n        dfs(k+1, c, v, h);\r\n    }\r\n}\r\n\r\nvoid merge(){\r\n    map<int, int>::iterator i;\r\n    map<int, int>::reverse_iterator ii;\r\n\r\n    ans = max(h1.rbegin()->second, h2.rbegin()->second);\r\n\r\n    for (i=h1.begin(), ii = h2.rbegin();i!=h1.end();i++){\r\n        while (ii!=h2.rend() && i->first + ii->first > m) ii++;\r\n        if (ii==h2.rend()) return;\r\n        \/\/printf(\"%u %d\\n\", it->first, it->second);\r\n        \/\/printf(\"%u %d\\n\", itt->first, itt->second);\r\n        ans = max(ans, i->second + ii->second);\r\n    }\r\n}\r\n\r\nvoid solve(){\r\n    step = n\/2; dfs(0, 0, 0, h1);\r\n    step = n; dfs(n\/2, 0, 0, h2);\r\n\r\n    map<int, int>::iterator i, ii;\r\n    for (i=h1.begin(),ii=i,ii++;ii!=h1.end();i++,ii++)\r\n        ii->second = max(i->second, ii->second);\r\n    for (i=h2.begin(),ii=i,ii++;ii!=h2.end();i++,ii++)\r\n        ii->second = max(i->second, ii->second);\r\n    merge();\r\n}\r\n\r\nvoid init(){\r\n    scanf(\"%d %d\", &n, &m);\r\n\r\n    int x, y;\r\n    for (int i=0;i<n;i++)\r\n        scanf(\"%d %d\", &#038;C[i], &#038;V[i]);\r\n    h1.clear(); h2.clear();\r\n}\r\n\r\nint main(){\r\n    int T; cin >> T;\r\n    while (T--){\r\n        init(); solve();\r\n        cout << ans << endl;\r\n    }\r\n}\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Brief description : \u5361\u641c\u7d22\uff0c\u5361DP\u76840\/1\u80cc\u5305\u95ee\u9898\u3002 (N<\/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":[1],"tags":[],"class_list":["post-113","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-1P","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/113","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=113"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/113\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}