{"provider_name":"Hatena Blog","author_name":"inamori","author_url":"https://blog.hatena.ne.jp/inamori/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F2023%2F08%2F19%2F100539\" title=\"\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u6570\u5b66 091\uff082\uff09 - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":[],"image_url":null,"url":"https://inamori.hateblo.jp/entry/2023/08/19/100539","blog_url":"https://inamori.hateblo.jp/","published":"2023-08-19 10:05:39","height":"190","title":"\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u6570\u5b66 091\uff082\uff09","provider_url":"https://hatena.blog","version":"1.0","blog_title":"inamori\u2019s diary","width":"100%","type":"rich","description":"https://atcoder.jp/contests/math-and-algorithm/tasks/math_and_algorithm_br\u3057\u3089\u307f\u3064\u3076\u3057\u3067\u3082\u5341\u5206\u901f\u3044\u306e\u3067\u3059\u304c\u3001O(1)\u3067\u3082\u8a08\u7b97\u53ef\u80fd\u3067\u3059\u3002 \u306e\u6761\u4ef6\u3060\u3068\u3001\u6b63\u4e09\u89d2\u5f62\u306e\u9818\u57df\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067N\u4ee5\u4e0b\u3068\u3044\u3046\u6761\u4ef6\u3092\u3064\u3051\u308b\u3068\u3001N\u304cX-2\u3088\u308a\u5c0f\u3055\u3051\u308c\u3070\u3001\u6b63\u4e09\u89d2\u5f62\u306e\u9802\u70b9\u4ed8\u8fd1\u306e\u6b63\u4e09\u89d2\u5f62\u304c\u843d\u3068\u3055\u308c\u3066\u3001\u516d\u89d2\u5f62\u306e\u9818\u57df\u306b\u306a\u308a\u307e\u3059\u3002\u3055\u3089\u306bN\u304c\u5c0f\u3055\u3051\u308c\u3070\u3001\u5207\u308a\u843d\u3068\u3055\u308c\u3059\u304e\u3066\u518d\u3073\u6b63\u4e09\u89d2\u5f62\u306e\u9818\u57df\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001N=4, X=10\u306e\u5834\u5408\u3067\u3059\u3002\u305d\u3053\u304b\u3089\u3001a, b, c\u306e\u3069\u308c\u304b\u304c\u540c\u3058\u3068\u304d\u3092\u9664\u3044\u3066\u30016\u3067\u5272\u308a\u307e\u3059\u3002 // How Many Ways? #![allo\u2026"}