{"author_url":"https://blog.hatena.ne.jp/kmjp/","width":"100%","version":"1.0","blog_title":"kmjp's blog","blog_url":"https://kmjp.hatenablog.jp/","published":"2026-05-11 09:30:00","image_url":null,"categories":["ARC"],"url":"https://kmjp.hatenablog.jp/entry/2026/05/11/0930","provider_url":"https://hatena.blog","author_name":"kmjp","provider_name":"Hatena Blog","description":"\u4e00\u898b\u3073\u3063\u304f\u308a\u3059\u308b\u3051\u3069\u5b9f\u306f\u5358\u7d14\u3002 https://atcoder.jp/contests/arc219/tasks/arc219_b","title":"AtCoder ARC #219 : B - Reverse Permutation","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkmjp.hatenablog.jp%2Fentry%2F2026%2F05%2F11%2F0930\" title=\"AtCoder ARC #219 : B - Reverse Permutation - kmjp&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","height":"190"}