griefworker https://blog.hatena.ne.jp/griefworker/ present https://tnakamura.hatenablog.com/ C# 競技プログラミング atcoder.jp 降順にソートして、先頭から 1 つずつ Alice と Bob 交互に割り振っていけばいい。 using System; using System.Linq; namespace ABC088B { class Program { static void Main(string[] args) { _ = int.Parse(Console.ReadLine()); var a = Console.ReadLine().Split(' ') .Select(x => int.Parse(x)) .OrderByDescending(x => x) .ToArray(); … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftnakamura.hatenablog.com%2Fentry%2F2020%2F08%2F28%2Fabc088b" title="ABC088B - Card Game for Two - present" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2020-08-28 08:00:55 rich https://tnakamura.hatenablog.com/entry/2020/08/28/abc088b 1.0 100%