\u611f\u89c9\u667a\u5546\u88ab\u7206\u4e86\u3002\u3002F \u662f\u975e\u5e38\u7b80\u5355\u7684\u6784\u9020\u9898\uff0c\u4ee3\u7801\u91cf\u975e\u5e38\u77ed\uff0c\u6240\u4ee5\u8fd9\u573a\u8981\u4e0a\u5206\uff0c\u5fc5\u987b\u8981\u80fd\u79d2 F\u3002\u3002\u3002<\/p>\n
https:\/\/codeforces.com\/contest\/1594<\/a> \u9996\u5148\u5982\u679c s \u8db3\u591f\u5927\uff0c\u90a3\u4e48\u80af\u5b9a\u53ef\u4ee5\u505a\u5230\u4e0d\u7c98\u9505\u3002\u3002\u3002 \u518d\u770b\u4e00\u822c\u60c5\u51b5\uff0c\u6211\u4eec\u8003\u5bdf\u524d\u7f00\u548c\uff0c\u53ea\u8981\u6784\u9020\u51fa\u4e0d\u5b58\u5728\u4e24\u9879\u5dee\u7b49\u4e8e k \u7684\u60c5\u51b5\u5373\u53ef\u3002 \u611f\u89c9\u667a\u5546\u88ab\u7206\u4e86\u3002\u3002F \u662f\u975e\u5e38\u7b80\u5355\u7684\u6784\u9020\u9898\uff0c\u4ee3\u7801\u91cf\u975e\u5e38\u77ed\uff0c\u6240\u4ee5\u8fd9\u573a\u8981\u4e0a\u5206\uff0c\u5fc5\u987b\u8981\u80fd\u79d2 F\u3002\u3002\u3002 https:\/\/codeforces.com\/contest\/1594 https:\/\/zhuanlan.zhihu.com\/p\/419250842 \u9996\u5148\u5982\u679c s \u8db3\u591f\u5927\uff0c\u90a3\u4e48\u80af\u5b9a\u53ef\u4ee5\u505a\u5230\u4e0d\u7c98\u9505\u3002\u3002\u3002 \u4e0d\u59a8\u8003\u8651 k=1\uff0c\u5927\u6982\u53ef\u4ee5\u9e3d\u5de2\u539f\u7406\u3002\u3002 2 2 2 2 2 \u53ea\u8981 s >= 2n \u5c31\u53ef\u4ee5\u4e0d\u7c98\u3002 \u518d\u770b\u4e00\u822c\u60c5\u51b5\uff0c\u6211\u4eec\u8003\u5bdf\u524d\u7f00\u548c\uff0c\u53ea\u8981\u6784\u9020\u51fa\u4e0d\u5b58\u5728\u4e24\u9879\u5dee\u7b49\u4e8e k \u7684\u60c5\u51b5\u5373\u53ef\u3002 \u4e0a\u9762\u7684 case \u5c31\u662f\u3002\u3002 [0][2k][4k]… \u4e00\u822c\u60c5\u51b5\u4e0b\u6700\u5c0f\u7684\u6784\u9020\uff0c\u5927\u6982\u957f\u8fd9\u6837… [0,K-1][2K,3K-1][d2k,d2k+r]… d = n\/k, r = n%k\u3002 \u6700\u540e\u522b\u5fd8\u4e86\u7279\u5224 s==k \u7684\u60c5\u51b5\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e0a\u9762\u7684\u6784\u9020\u53ef\u80fd\u53ea\u6709\u4e00\u4e2a\u533a\u95f4\uff0c \u7136\u540e\u867d\u7136 s>=ss\uff0c\u4f46\u662f\u56e0\u4e3a\u524d\u9762\u6709\u4e2a\u56fa\u5b9a\u7684 0\uff0c\u8fd8\u662f\u4f1a\u7c98\u4e0a\u3002 bool ok() { LL s, n, k; RD(s,n,k); if (s == k) return 1; […]<\/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-1784","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p2tdP7-sM","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1784","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=1784"}],"version-history":[{"count":1,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1784\/revisions"}],"predecessor-version":[{"id":1785,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/posts\/1784\/revisions\/1785"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/media?parent=1784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/categories?post=1784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/house\/wp-json\/wp\/v2\/tags?post=1784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nhttps:\/\/zhuanlan.zhihu.com\/p\/419250842<\/a><\/p>\n
\n\u4e0d\u59a8\u8003\u8651 k=1\uff0c\u5927\u6982\u53ef\u4ee5\u9e3d\u5de2\u539f\u7406\u3002\u3002
\n2 2 2 2 2<\/code>
\n\u53ea\u8981 s >= 2n \u5c31\u53ef\u4ee5\u4e0d\u7c98\u3002<\/p>\n
\n\u4e0a\u9762\u7684 case \u5c31\u662f\u3002\u3002
\n[0][2k][4k]... <\/code>
\n\u4e00\u822c\u60c5\u51b5\u4e0b\u6700\u5c0f\u7684\u6784\u9020\uff0c\u5927\u6982\u957f\u8fd9\u6837…
\n[0,K-1][2K,3K-1][d2k,d2k+r]...<\/code>
\nd = n\/k, r = n%k\u3002
\n\u6700\u540e\u522b\u5fd8\u4e86\u7279\u5224 s==k \u7684\u60c5\u51b5\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e0a\u9762\u7684\u6784\u9020\u53ef\u80fd\u53ea\u6709\u4e00\u4e2a\u533a\u95f4\uff0c
\n\u7136\u540e\u867d\u7136 s>=ss\uff0c\u4f46\u662f\u56e0\u4e3a\u524d\u9762\u6709\u4e2a\u56fa\u5b9a\u7684 0\uff0c\u8fd8\u662f\u4f1a\u7c98\u4e0a\u3002<\/p>\n\r\n\r\nbool ok() {\r\n LL s, n, k; RD(s,n,k); if (s == k) return 1;\r\n LL d = n \/ k, r = n % k;\r\n LL ss = d*2*k + r;\r\n return s < ss;\r\n}\r\n\r\nint main() {\r\n\r\n#ifndef ONLINE_JUDGE\r\n freopen("\/Users\/minakokojima\/Documents\/GitHub\/ACM-Training\/Workspace\/in.txt", "r", stdin);\r\n \/\/freopen("\/Users\/minakokojima\/Documents\/GitHub\/ACM-Training\/Workspace\/out.txt", "w", stdout);\r\n#endif\r\n Rush {\r\n puts(ok()?"YES":"NO");\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"