public static void ToVec(int[,] mat)
        {
            int i,j;
            int[] vec = new int[mat.GetLength(0) * mat.GetLength(0)];
            int counter = 0;
            for ( i = 0; i < mat.GetLength(0); i++)
            {
               for ( j = 0; j < mat.GetLength(0); j++)
               {
                   vec[counter] = mat[i, j];
                   counter++;
               }
            }


            int degel = 1, mone = 0, c = 0;
            while (c < vec.Length)
            {
                degel = 1;
                for (i = 0; i < vec.Length; i++)
                {
                    if ((vec[c] == vec[i])&&(c!=i))
                        degel = 0;
                }
                if (degel == 1)
                {
                    mone++;
                }
                c++;
            }


            int[] vec2 = new int[mone];
            c = 0;
            counter=0;
            while (c < vec.Length)
            {
                degel = 1;
                for (i = 0; i < vec.Length; i++)
                {
                    if ((vec[c] == vec[i]) && (c != i))
                        degel = 0;
                }
                if (degel == 1)
                {
                    vec2[counter] = vec[c];
                        counter++;
                }
                c++;
            }


            for ( i = 0; i < vec2.Length; i++)
            {
                Console.Write(vec2[i] + "  ");
            }
        }