We will hold <a href="https://atcoder.jp/contests/arc207">AtCoder Regular Contest 207 (Div.1)</a>. - Contest URL: https://atcoder.jp/contests/arc207 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20251005T2100&p1=248 - Duration: 150 minutes - Number of Tasks: 5 - Writer: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/camypaper" class="username"><span class="user-orange">camypaper</span></a> - Tester: <a href="/users/maroonrk" class="username"><span style="color:#869120;">maroonrk</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"> <a href="/users/snuke" class="username"><span style="color:#1000AC;">snuke</span></a> - Rated range: 1600 ~ 2999 The point values will be 800-800-800-800-800. Please note that the rules against generative AI were updated on October 3, 2025. Please make sure to read [this post](https://atcoder.jp/posts/1568) and [the rules](https://info.atcoder.jp/entry/llm-rules-en). We are looking forward to your participation!