{"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","url":"https://inamori.hateblo.jp/entry/2025/08/25/201256","version":"1.0","title":"AtCoder Beginner Contest 420 D","author_name":"inamori","blog_url":"https://inamori.hateblo.jp/","image_url":null,"height":"190","author_url":"https://blog.hatena.ne.jp/inamori/","categories":[],"blog_title":"inamori\u2019s diary","published":"2025-08-25 20:12:56","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F2025%2F08%2F25%2F201256\" title=\"AtCoder Beginner Contest 420 D - 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>","type":"rich","description":"https://atcoder.jp/contests/abc420/tasks/abc420_d\u30de\u30b9\u3054\u3068\u306b\u30c9\u30a2\u304c\u5143\u901a\u308a\u3068\u53cd\u5bfe\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u304d\u306e\u6700\u5c0f\u306e\u64cd\u4f5c\u6570\u3092\u8a18\u9332\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u3002 // Substr Swap #![allow(non_snake_case)] use std::collections::VecDeque; //////////////////// library //////////////////// fn read<T: std::str::FromStr>() -> T { let mut line = String::new(); std::io::stdin().r\u2026"}