{"description":"A~D\u306e4\u5b8c\u3067\u3057\u305f\uff0e\u7d50\u679c\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3057\u305f\uff0e C, D\u3042\u305f\u308a\u3067\u624b\u304c\u6b62\u307e\u308b\u6642\u9593\u306f\u3042\u3063\u305f\u3082\u306e\u306e\uff0c\u6700\u7d42\u7684\u306b\u3069\u3061\u3089\u3082\u901a\u305b\u305f\u306e\u3067\u3088\u304b\u3063\u305f\u3067\u3059\uff0e A - Second Half Sum \u914d\u5217\u306e\u5f8c\u534a\u306b\u3042\u308b\u8981\u7d20\u306e\u7dcf\u548c\u3092\u6c42\u3081\u308b\u554f\u984c\uff0e n/2\u756a\u76ee\u304b\u3089n-1\u756a\u76ee\u307e\u3067\u8db3\u3059\u3060\u3051\uff0e\u306f\u3044 \u63d0\u51fa\u30b3\u30fc\u30c9 B - Old Maid \u540c\u3058\u6570\u5b57\u306e\u30ab\u30fc\u30c9\u30922\u679a\u305a\u3064\u53d6\u308a\u9664\u3044\u305f\u3068\u304d\uff0c\u6b8b\u3063\u305f\u30ab\u30fc\u30c9\u306e\u6570\u5b57\u306e\u7dcf\u548c\u3092\u6c42\u3081\u308b\u554f\u984c\uff0e 1~100\u304c\u3067\u305f\u56de\u6570\u3092\u6570\u3048\u3066\uff0c\u5947\u6570\u56de\u51fa\u3066\u304d\u305f\u6570\u3060\u3051\u8db3\u3059\u3060\u3051\uff0e \u63d0\u51fa\u30b3\u30fc\u30c9 C - Change Schools \u9ad8\u6a4b\u304f\u3093\u304c\u8ee2\u5165\u3057\u3066\u3082\u6240\u5c5e\u4eba\u6570\u304c\u6700\u5927\u306b\u306a\u308b\u30af\u30e9\u30b9\u306e\u500b\u6570\u3092\u6c42\u3081\u308b\u554f\u984c\uff0e \u6700\u521d\u306f\u5834\u5408\u5206\u3051\u304b\u30fc\u3068\u601d\u3063\u3066\u3044\u305f\u3093\u3067\u3059\u304c\uff0c\u2026","height":"190","author_name":"Ojoxux","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/Ojoxux/","url":"https://ojoxux.hatenablog.com/entry/2026/09/29/010023","title":"ABC473 \u3075\u308a\u304b\u3048\u308a","published":"2026-09-29 01:00:23","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/O/Ojoxux/20260909/20260909115752.png","version":"1.0","type":"rich","blog_title":"\u3067\u3063\u3066\u307e\u3093\u305a\u3001\u3082\u3063\u3051\u3060\u306e","categories":[],"provider_name":"Hatena Blog","blog_url":"https://ojoxux.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fojoxux.hatenablog.com%2Fentry%2F2026%2F09%2F29%2F010023\" title=\"ABC473 \u3075\u308a\u304b\u3048\u308a - \u3067\u3063\u3066\u307e\u3093\u305a\u3001\u3082\u3063\u3051\u3060\u306e\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%"}