using System;
namespace Rextester
{ public class Program
  { public static void Main(string[] args)
    { int [,] a = new int [6,6] {
        {27, 29,  2,  4, 13, 36},
        { 9, 11, 20, 22, 31, 18},
        {32, 25,  7,  3, 21, 23},
        {14, 16, 34, 30, 12,  5},
        {28,  6, 15, 17, 26, 19},
        { 1, 24, 33, 35,  8, 10}};        
      int [] r = new int [6] {0,0,0,0,0,0};
      int [] l = new int [6] {0,0,0,0,0,0};
      int [] d   = new int [2] {0,0};
      int j,k, n=6;
      for (j = 0; j<n; j++)
      { d[0] +=a[j,j];
        d[1] +=a[j,n-j-1];
        for (k = 0; k<n; k++) r[j] +=a[j,k];
        for (k = 0; k<n; k++) l[j] +=a[k,j];
      } 
      bool mag=(d[0]==d[1]);
      for (j = 0; j<n; j++) { mag = (mag && (r[j]==d[0]) && (l[j]==d[0]));}
      if (mag) Console.WriteLine("Таблиця є магічним квадратом.");
      else     Console.WriteLine("Таблиця не є магічним квадратом.");
    }
  }
}