Square Frame

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Kvadratna_ramka
{
    class Program
    {
        static void Main(string[] args)
        {
            int input = int.Parse(Console.ReadLine());
            for (int j = 0; j < input; j++)
            {
                for (int i = 0; i < input; i++)
                {
                    Console.Write("{0} ", new string(i == 0 || i == input - 1 ? '\u002B' : '\u002D', 1));
                }
                Console.WriteLine();
            }
        }
    }
}