{"id":168,"date":"2012-04-07T18:11:55","date_gmt":"2012-04-07T10:11:55","guid":{"rendered":"http:\/\/www.shuizilong.com\/house\/?p=168"},"modified":"2012-04-07T18:11:55","modified_gmt":"2012-04-07T10:11:55","slug":"poj-3398-perfect-service","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/poj-3398-perfect-service\/","title":{"rendered":"POJ 3398. Perfect Service"},"content":{"rendered":"<p><!--more--><\/p>\n<p>\u7565\u3002\uff09<\/p>\n<pre class=\"brush: cpp; light: false; title: ; toolbar: true; notranslate\" title=\"\">\r\nconst int N = 10009;\r\n\r\nint dp0&#x5B;N], dp1&#x5B;N], dp2&#x5B;N];\r\n\r\nVI adj&#x5B;N]; bool vst&#x5B;N];\r\nint n;\r\n\r\nvoid dfs(int u = 0){\r\n    vst&#x5B;u] = true; int delta = INF; dp0&#x5B;u] = 1;\r\n\r\n#define v adj&#x5B;u]&#x5B;i]\r\n\r\n    REP(i, SZ(adj&#x5B;u])) if (!vst&#x5B;v]){\r\n        dfs(v), dp0&#x5B;u] += min(dp0&#x5B;v], dp2&#x5B;v]), dp2&#x5B;u] += dp1&#x5B;v];\r\n        if (dp0&#x5B;v] &lt;= dp1&#x5B;v]) dp1&#x5B;u] += dp0&#x5B;v], delta = 0;\r\n        else dp1&#x5B;u] += dp1&#x5B;v], checkMin(delta, dp0&#x5B;v] - dp1&#x5B;v]);;\r\n    }\r\n\r\n    dp1&#x5B;u] += delta;\r\n}\r\n\r\nint main(){\r\n\r\n    \/\/freopen(&quot;in.txt&quot;, &quot;r&quot;, stdin);\r\n\r\n    do {\r\n        int a, b; FOR_C(i, 1, _RD(n)) RD(a, b), --a, --b, adj&#x5B;a].PB(b), adj&#x5B;b].PB(a);\r\n        dfs(), OT(min(dp0&#x5B;0], dp1&#x5B;0])), RST(vst, dp0, dp1, dp2); REP(i, n) CLR(adj&#x5B;i]);\r\n    } while (RD() != -1);\r\n}\r\n<\/pre>\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_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","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[19],"tags":[],"class_list":["post-168","post","type-post","status-publish","format-standard","hentry","category-poj"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-2I","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/168","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=168"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/168\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}