{"title":"SRM517 Div1 250","categories":["\u3068\u3077\u3053\u3060","\u904e\u53bb\u554f"],"author_name":"phyllo_algo","height":"190","url":"https://phyllo-algo.hatenadiary.org/entry/20110911/1315759934","published":"2011-09-11 01:52:14","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fphyllo-algo.hatenadiary.org%2Fentry%2F20110911%2F1315759934\" title=\"SRM517 Div1 250 - \u308c\u3069\u3053\u3060\u76ee\u6307\u3059\u3088\uff01\u3000(\uff1b`\u30fb\u03c9\u30fb\uff09\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","image_url":null,"author_url":"https://blog.hatena.ne.jp/phyllo_algo/","version":"1.0","type":"rich","blog_url":"https://phyllo-algo.hatenadiary.org/","blog_title":"\u308c\u3069\u3053\u3060\u76ee\u6307\u3059\u3088\uff01\u3000(\uff1b`\u30fb\u03c9\u30fb\uff09","description":"\u554f\u984c \u3042\u308b\u6574\u6570N\u3068target\u304c\u4e0e\u3048\u3089\u308c\u308b\u3002 \u6574\u6570x\u3092\u3082\u3057y*z==x\u3068\u306a\u308by,z(>=2)\u306b\u5206\u89e3\u3067\u304d\u308b\u3068\u304d\u3001x\u306fy\u3068z\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002 \u6574\u6570N\u3092\u4e0a\u8a18\u306e\u3088\u3046\u306b\u5206\u89e3\u3057\u3066\u3044\u3063\u305f\u3068\u304d\u306b\u3001\u5e38\u306btarget\u306e\u6570\u5024\u304c\u51fa\u3066\u304f\u308b\u5834\u5408\u306f\"Yes\"\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\"No\"\u3092\u8fd4\u305b\u3002\u4f8b\u3048\u3070\u3001N=12,target=6\u306e\u5834\u5408\u306f\u3001 12->(2,6)->ok 12->(3,4)->ng \u306a\u306e\u3067\u3001\"No\"\u3092\u8fd4\u3059\u3002N=8,target=4\u306e\u5834\u5408\u306f\u3001 8->(2,4)->ok 8->(4,2)->ok \u306a\u306e\u3067\u3001\"Yes\"\u3092\u8fd4\u3059\u3002 \u8003\u3048\u65b9 \u7d20\u76f4\u306b\u30e1\u30e2\u5316dfs\u3002\u3042\u308b\u6574\u6570x\u3092\u5206\u89e3\u3059\u308b\u3068\u5e38\u306btarget\u306e\u6570\u5024\u51fa\u3066\u304f\u308b\u5834\u5408tr\u2026"}