{"author_name":"atetubou","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/atetubou/","url":"https://atetubou.hatenadiary.org/entry/20110305/1299310578","type":"rich","width":"100%","blog_url":"https://atetubou.hatenadiary.org/","blog_title":"\u65e5\u8a18","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fatetubou.hatenadiary.org%2Fentry%2F20110305%2F1299310578\" title=\"PKU 3049 Securing the Barn - \u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["PKU"],"description":"http://poj.org/problem?id=3049 \u4e0e\u3048\u3089\u308c\u305fn\u6587\u5b57\u306e\u3046\u3061l\u6587\u5b57\u3092\u4f7f\u3044\u3001\u306a\u304a\u304b\u3064\u6bcd\u97f3\u304c1\u3064\u4ee5\u4e0a\u3001\u5b50\u97f3\u304c2\u3064\u4ee5\u4e0a\u304b\u3089\u69cb\u6210\u3055\u308c\u308b\u30bd\u30fc\u30c8\u3055\u308c\u305f\u6587\u5b57\u5217\u3092\u8f9e\u66f8\u9806\u306b\u51fa\u529b\u3059\u308b\u3068\u3044\u3046\u3088\u3046\u306a\u554f\u984c\u3002\u30bd\u30fc\u30c8\u3057\u3066\u3001dfs\u3057\u307e\u3057\u305f\u3002 int n,l; char cc[15]; char ans[15]; void dfs(int len,int pa,int ch,int pos){ if(len==l && pa>=1 && ch>=2){ cout<<ans<<endl; return; } if(len>=l)return; for(int i=pos;i<n;i++){ ans[len\u2026","provider_name":"Hatena Blog","title":"PKU 3049 Securing the Barn","image_url":null,"height":"190","version":"1.0","published":"2011-03-05 16:36:18"}