题解 | 单组_字符串

using System;
public class Program {
    public static void Main() {
        Console.ReadLine();
            string line = Console.ReadLine();
            
            if (line != null)
            {
                char[] charArray = line.ToCharArray();
                Array.Reverse(charArray);
                string rs = new string(charArray);

                Console.WriteLine(rs);
            }
            Console.ReadLine();
        
    }
}