{"id":2053,"date":"2022-12-02T01:29:27","date_gmt":"2022-12-01T17:29:27","guid":{"rendered":"https:\/\/www.shuizilong.com\/house\/?p=2053"},"modified":"2022-12-02T13:03:25","modified_gmt":"2022-12-02T05:03:25","slug":"codeforces-global-round-24","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/house\/archives\/codeforces-global-round-24\/","title":{"rendered":"Codeforces Global Round 24"},"content":{"rendered":"<ul>\n<li><a href=\"https:\/\/codeforces.com\/contest\/1764\">https:\/\/codeforces.com\/contest\/1764<\/a><\/li>\n<li><a href=\"https:\/\/t.me\/algorithm_daily_of_minako\/7665\">https:\/\/t.me\/algorithm_daily_of_minako\/7665<\/a><\/li>\n<\/ul>\n<h2>Problem D. Doremy&#8217;s Pegging Game<\/h2>\n<p>\u603b\u4e4b\u5f88\u50cf\u662f <a href=\"https:\/\/www.shuizilong.com\/house\/archives\/pinely-round-1\/\">\u4e0a\u4e00\u573a\u7684 D \u9898<\/a>\u3002\u3002\u4e5f\u662f\u9700\u8981\u679a\u4e3e\u4e00\u4e9b\u4e1c\u897f\u7684\u7ec4\u5408\u8ba1\u6570\u3002\u3002\u3002<br \/>\n\u5148\u679a\u4e3e\u6700\u540e\u5269\u4e0b\u7684\u89d2\u5ea6\uff0c\u518d\u679a\u4e3e\u8fd9\u4e2a\u89d2\u5ea6\u4e2d\u95f4\u8fd8\u5269\u51e0\u4e2a\u5373\u53ef\uff0c\u6700\u540e\u8bb0\u5f97\u8ba8\u8bba\u4e00\u4e0b\u5947\u5076\u3002<\/p>\n<h2>Problem E. Doremy&#8217;s Number Line<\/h2>\n<p>\u9996\u5148\u5982\u679c x \u80fd\u88ab\u67d3\u8272\uff0c\u90a3\u4e48 x-1 \u4e5f\u4e00\u5b9a\u80fd\u88ab\u67d3\u8272\uff0c\u56e0\u6b64\u6211\u4eec\u53ea\u8981\u6c42\u51fa\u80fd\u591f\u6784\u9020\u51fa\u7684\u6700\u5927\u503c\uff0c\u5e76\u548c k \u505a\u6bd4\u8f83\u5373\u53ef\u3002<br \/>\n\u90a3\u4e48\u663e\u7136\u6211\u4eec\u6709\u5e73\u51e1\u4e0b\u754c a[0] \u548c\u5e73\u51e1\u4e0a\u754c a[0] + b[0]\uff0c\u8fd9\u662f\u56e0\u4e3a\u6211\u4eec\u6700\u540e\u4e00\u6b65\u5fc5\u987b\u67d3 0\u3002<\/p>\n<p>\u73b0\u5728\u6211\u4eec\u4e0d\u8003\u8651 0\uff0c\u770b\u5269\u4e0b\u7684\u6570\u6700\u5927\u67d3\u8272\u80fd\u5426\u5230\u8fbe a[0]\uff0c\u4e8e\u662f\u6211\u4eec\u5f52\u7ea6\u5230\u4e86\u4e00\u4e2a\u5b50\u95ee\u9898\uff0c\u4f46\u662f\u8fd9\u91cc\u6211\u4eec\u8fd8\u662f\u6709\u4e00\u9897\u5173\u4e8e\u6392\u5217\u7684\u641c\u7d22\u6811\u9700\u8981\u5904\u7406\u3002<br \/>\n\u95ee\u9898\u7684\u6838\u5fc3\u5c31\u662f\u8003\u5bdf\u8fd9\u68f5\u641c\u7d22\u6811\uff0c\u5bfb\u6c42\u526a\u679d\u3002<\/p>\n<p>\u6211\u4eec\u53d1\u73b0\u53ea\u8981\u6839\u636e a \u8fdb\u884c\u6392\u5e8f\uff0c\u5c31\u53ef\u4ee5\u628a\u641c\u7d22\u6811\u7684\u89c4\u6a21\u4f18\u5316\u6210 O(n)\u3002<br \/>\n\u5177\u4f53\u770b <a href=\"https:\/\/codeforces.com\/blog\/entry\/109468\">\u9898\u89e3<\/a>\u3002\u3002\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u79cd\u505a\u6cd5\u662f\u6309 a+b \u8fdb\u884c\u6392\u5e8f\uff0c\u4e5f\u53ef\u4ee5\u628a\u641c\u7d22\u6811\u7684\u89c4\u6a21\u4f18\u5316\u6210 O(n)\u3002<br \/>\n\u5177\u4f53\u770b <a href=\"https:\/\/codeforces.com\/blog\/entry\/109468?#comment-976124\">\u8fd9\u91cc<\/a>\u3002\u3002\u3002<\/p>\n<p>\u5229\u7528\u6392\u5e8f\u91cd\u65b0\u7ec4\u7ec7\u641c\u7d22\u987a\u5e8f\u5012\u662f\u641c\u7d22\u9898\u7684\u5e38\u89c1\u526a\u679d\u6280\u5de7\u3002\u3002\u3002\u4e0d\u8fc7\u8fd9\u6b21\u662f\u76f4\u63a5\u53d8\u6210\u7b80\u5355\u8d2a\u5fc3\u3002\u3002\u3002<br \/>\n\u603b\u4e4b\u770b\u8d77\u6765\u5f88\u7b80\u5355\u3002\u3002\u4f46\u662f\u5bf9\u6211\u6765\u8bf4\u8fd8\u662f\u633a\u96be\u7684\u3002\u3002\u3002<\/p>\n<h2>Problem F. Doremy&#8217;s Experimental Tree<\/h2>\n<p>\u8ba9\u4eba\u60f3\u8d77 <a href=\"https:\/\/www.shuizilong.com\/house\/archives\/codeforces-global-round-21\/\">#21 \u7684 F \u9898<\/a>\u3002\u3002\u4e0d\u8fc7\u8fd9\u4e2a\u9898\u5176\u5b9e\u66f4\u5bb9\u6613\u3002\u3002<\/p>\n<p>\u6838\u5fc3\u662f f() \u51fd\u6570\u6ee1\u8db3\u5728\u6811\u4e2d\u8def\u5f84\u5305\u542b\u5173\u7cfb\u7684\u5355\u8c03\u6027\uff08\u56db\u8fb9\u5f62\u4e0d\u7b49\u5f0f\uff1f\uff09\uff0c\u800c\u6811\u7684\u8ddd\u79bb\u51fd\u6570\u4e5f\u6ee1\u8db3\u8fd9\u4e00\u6027\u8d28\u3002<br \/>\n\u56e0\u6b64\u76f4\u63a5\u7528 f() \u6c42\u6700\u5927\u751f\u6210\u6811\uff08\u56e0\u4e3a\u5355\u8c03\u6027\u6070\u597d\u662f\u53cd\u7684\uff09\u5c31\u53ef\u4ee5\u5f97\u51fa\u6811\u7684\u7ed3\u6784\uff0c\u518d\u7b80\u5355\u5197\u65a5\u5c31\u53ef\u4ee5\u5f97\u51fa\u8fb9\u6743\u3002<br \/>\n\u4e5f\u53ef\u4ee5\u53cd\u8fc7\u6765\u5148\u7528\u5197\u65a5\u76f4\u63a5\u5f97\u51fa\u8ddd\u79bb\u51fd\u6570\uff0c\u518d\u7528\u8ddd\u79bb\u51fd\u6570\u6c42\u6700\u5c0f\u751f\u6210\u6811\u5373\u53ef\u5f97\u5230\u6811\u7684\u7ed3\u6784\uff0c\u53c2\u8003 <a href=\"https:\/\/zhuanlan.zhihu.com\/p\/587885558\">\u8fd9\u91cc<\/a>\u3002<\/p>\n<p>\u603b\u4e4b\u9898\u76ee\u6240\u7ed9\u5b9a\u7684\u4fe1\u606f\u91cf\u662f\u5197\u4f59\u7684\uff0c\u505a\u6cd5\u5e94\u8be5\u5f88\u591a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/codeforces.com\/contest\/1764 https:\/\/t.me\/algorithm_daily_of_minako\/7665 Problem D. Doremy&#8217;s Pegging Game \u603b\u4e4b\u5f88\u50cf\u662f \u4e0a\u4e00\u573a\u7684 D \u9898\u3002\u3002\u4e5f\u662f\u9700\u8981\u679a\u4e3e\u4e00\u4e9b\u4e1c\u897f\u7684\u7ec4\u5408\u8ba1\u6570\u3002\u3002\u3002 \u5148\u679a\u4e3e\u6700\u540e\u5269\u4e0b\u7684\u89d2\u5ea6\uff0c\u518d\u679a\u4e3e\u8fd9\u4e2a\u89d2\u5ea6\u4e2d\u95f4\u8fd8\u5269\u51e0\u4e2a\u5373\u53ef\uff0c\u6700\u540e\u8bb0\u5f97\u8ba8\u8bba\u4e00\u4e0b\u5947\u5076\u3002 Problem E. Doremy&#8217;s Number Line \u9996\u5148\u5982\u679c x \u80fd\u88ab\u67d3\u8272\uff0c\u90a3\u4e48 x-1 \u4e5f\u4e00\u5b9a\u80fd\u88ab\u67d3\u8272\uff0c\u56e0\u6b64\u6211\u4eec\u53ea\u8981\u6c42\u51fa\u80fd\u591f\u6784\u9020\u51fa\u7684\u6700\u5927\u503c\uff0c\u5e76\u548c k \u505a\u6bd4\u8f83\u5373\u53ef\u3002 \u90a3\u4e48\u663e\u7136\u6211\u4eec\u6709\u5e73\u51e1\u4e0b\u754c a[0] \u548c\u5e73\u51e1\u4e0a\u754c a[0] + b[0]\uff0c\u8fd9\u662f\u56e0\u4e3a\u6211\u4eec\u6700\u540e\u4e00\u6b65\u5fc5\u987b\u67d3 0\u3002 \u73b0\u5728\u6211\u4eec\u4e0d\u8003\u8651 0\uff0c\u770b\u5269\u4e0b\u7684\u6570\u6700\u5927\u67d3\u8272\u80fd\u5426\u5230\u8fbe a[0]\uff0c\u4e8e\u662f\u6211\u4eec\u5f52\u7ea6\u5230\u4e86\u4e00\u4e2a\u5b50\u95ee\u9898\uff0c\u4f46\u662f\u8fd9\u91cc\u6211\u4eec\u8fd8\u662f\u6709\u4e00\u9897\u5173\u4e8e\u6392\u5217\u7684\u641c\u7d22\u6811\u9700\u8981\u5904\u7406\u3002 \u95ee\u9898\u7684\u6838\u5fc3\u5c31\u662f\u8003\u5bdf\u8fd9\u68f5\u641c\u7d22\u6811\uff0c\u5bfb\u6c42\u526a\u679d\u3002 \u6211\u4eec\u53d1\u73b0\u53ea\u8981\u6839\u636e a \u8fdb\u884c\u6392\u5e8f\uff0c\u5c31\u53ef\u4ee5\u628a\u641c\u7d22\u6811\u7684\u89c4\u6a21\u4f18\u5316\u6210 O(n)\u3002 \u5177\u4f53\u770b \u9898\u89e3\u3002\u3002\u3002 \u8fd8\u6709\u4e00\u79cd\u505a\u6cd5\u662f\u6309 a+b \u8fdb\u884c\u6392\u5e8f\uff0c\u4e5f\u53ef\u4ee5\u628a\u641c\u7d22\u6811\u7684\u89c4\u6a21\u4f18\u5316\u6210 O(n)\u3002 \u5177\u4f53\u770b \u8fd9\u91cc\u3002\u3002\u3002 \u5229\u7528\u6392\u5e8f\u91cd\u65b0\u7ec4\u7ec7\u641c\u7d22\u987a\u5e8f\u5012\u662f\u641c\u7d22\u9898\u7684\u5e38\u89c1\u526a\u679d\u6280\u5de7\u3002\u3002\u3002\u4e0d\u8fc7\u8fd9\u6b21\u662f\u76f4\u63a5\u53d8\u6210\u7b80\u5355\u8d2a\u5fc3\u3002\u3002\u3002 \u603b\u4e4b\u770b\u8d77\u6765\u5f88\u7b80\u5355\u3002\u3002\u4f46\u662f\u5bf9\u6211\u6765\u8bf4\u8fd8\u662f\u633a\u96be\u7684\u3002\u3002\u3002 Problem F. Doremy&#8217;s Experimental Tree \u8ba9\u4eba\u60f3\u8d77 [&hellip;]<\/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-2053","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-x7","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/2053","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=2053"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/2053\/revisions"}],"predecessor-version":[{"id":2054,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/2053\/revisions\/2054"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=2053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=2053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=2053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}