05. Square Frame

using System;

namespace SquareFrame

{
    class Program
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());

            for (int i = 0; i < n; i++)
            {
                char angleChar = '|';
                if (i == 0 || i == n - 1)
                {
                    angleChar = '+';
                }
                Console.Write(angleChar);
                for (int x = 0; x < n - 2; x++)
                {
                    Console.Write(" -");
                }
                Console.WriteLine($" {angleChar}");
            }
        }
    }
}