{"width":"100%","type":"rich","blog_title":"suisen \u306e\u30d6\u30ed\u30b0","image_url":"https://cdn.blog.st-hatena.com/images/theme/og-image-1500.png","title":" AtCoder Regular Contest 124 F - Chance Meeting","description":"\u554f\u984c atcoder.jp \u89e3\u6cd5 \u96d1\u3067\u3059\u304c\u753b\u50cf\u3060\u3051\u3067\u4f1d\u308f\u3063\u3066\u307b\u3057\u3044\u3002 \u554f\u984c\u6587\u306e $H,W$ \u304b\u3089\u305d\u308c\u305e\u308c $1$ \u305a\u3064\u5f15\u3044\u3066\u7e26\u306e\u79fb\u52d5\u56de\u6570\u304c\u3061\u3087\u3046\u3069 $H$ \u56de\u3001\u6a2a\u306e\u79fb\u52d5\u56de\u6570\u304c\u3061\u3087\u3046\u3069 $W$ \u56de\u306b\u306a\u308b\u3088\u3046\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002 \u753b\u50cf\u4e2d\u306e\u300c\u975e\u4ea4\u5dee\u300d\u3068\u3044\u3046\u8868\u73fe\u306f\u4e0d\u9069\u5207\u304b\u3082\u3057\u308c\u306a\u304f\u3066\u3001\u6b63\u78ba\u306b\u306f\u300c\u59cb\u7d42\u70b9\u4ee5\u5916\u3067\u540c\u3058\u30de\u30b9\u306b\u3044\u308b\u3053\u3068\u304c\u306a\u3044\u3088\u3046\u306a\u3088\u3046\u306a\u79fb\u52d5\u300d\u3067\u3059\u3002 \u88dc\u8db3 $\\displaystyle \\sum _ {n = 0} ^ \\infty \\binom{2n}{n} x ^ n = \\dfrac{1}{\\sqrt{1 - 4x}}$ \u306f\u3001\u30ab\u30bf\u30e9\u30f3\u6570\u306e\u6bcd\u95a2\u6570 $\\displaystyle \\sum _ {n \u2026","provider_name":"Hatena Blog","blog_url":"https://suisen-kyopro.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/suisen_kyopro/","author_name":"suisen_kyopro","url":"https://suisen-kyopro.hatenablog.com/entry/2023/09/22/193146","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsuisen-kyopro.hatenablog.com%2Fentry%2F2023%2F09%2F22%2F193146\" title=\" AtCoder Regular Contest 124 F - Chance Meeting - suisen \u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","version":"1.0","published":"2023-09-22 19:31:46","categories":[]}