Class Task 51#

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Insert(int[,] arr)
        {
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr.GetLength(1); j++)
                {
                    Console.Write(i + " " + j + ": ");
                    arr[i, j] = int.Parse(Console.ReadLine());
                }
            }
        }
        static bool Check(int[,] arr)
        {
            bool ok = true;
            int length = 0;
            int tempcount = 0;
            for (int j = 0; j < arr.GetLength(1); j++)
            {
                length += arr[0, j];
            }
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr.GetLength(1); j++)
                    {
                        tempcount += arr[i, j];
                    }
                    if (tempcount != length)
                        ok = false;
                    tempcount = 0;
                }
            for (int j = 0; j < arr.GetLength(1); j++)
            {
                for (int i = 0; i < arr.GetLength(0); i++)
                {
                    tempcount += arr[i, j];
                }
                if (tempcount != length)
                    ok = false;
                tempcount = 0;
            }
            /////////////
                int var = 0;
                for (int j = 0; j < arr.GetLength(0); j++)
                {
                    tempcount += arr[var, j];
                    var++;
                }
                if (tempcount != length)
                    ok = false;
                tempcount = 0;
                var = arr.GetLength(1)-1;
                for (int i = 0; i < arr.GetLength(0); i++)
                {
                    tempcount += arr[i, var];
                    var--;
                }
                if (tempcount != length)
                    ok = false;
                tempcount = 0;
            return ok;
        }
        static void Main(string[] args)
        {
            int a = int.Parse(Console.ReadLine());
            int[,] square = new int[a, a];
            Insert(square);
            Console.Clear();
            bool check = Check(square);
            Console.WriteLine(check);
            Console.ReadKey();
        }
    }
}