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  1. Module LargestProductGrid \'My solution to Project Euler Problem 11
  2.     Private R As Integer = 0
  3.     Private G(,) As Integer = {{8, 2, 22, 97, 38, 15, 0, 40, 0, 75, 4, 5, 7, 78, 52, 12, 50, 77, 91, 8}, _
  4.                                {49, 49, 99, 40, 17, 81, 18, 57, 60, 87, 17, 40, 98, 43, 69, 48, 4, 56, 62, 0}, _
  5.                                {81, 49, 31, 73, 55, 79, 14, 29, 93, 71, 40, 67, 53, 88, 30, 3, 49, 13, 36, 65}, _
  6.                                {52, 70, 95, 23, 4, 60, 11, 42, 69, 24, 68, 56, 1, 32, 56, 71, 37, 2, 36, 91}, _
  7.                                {22, 31, 16, 71, 51, 67, 63, 89, 41, 92, 36, 54, 22, 40, 40, 28, 66, 33, 13, 80}, _
  8.                                {24, 47, 32, 60, 99, 3, 45, 2, 44, 75, 33, 53, 78, 36, 84, 20, 35, 17, 12, 50}, _
  9.                                {32, 98, 81, 28, 64, 23, 67, 10, 26, 38, 40, 67, 59, 54, 70, 66, 18, 38, 64, 70}, _
  10.                                {67, 26, 20, 68, 2, 62, 12, 20, 95, 63, 94, 39, 63, 8, 40, 91, 66, 49, 94, 21}, _
  11.                                {24, 55, 58, 5, 66, 73, 99, 26, 97, 17, 78, 78, 96, 83, 14, 88, 34, 89, 63, 72}, _
  12.                                {21, 36, 23, 9, 75, 0, 76, 44, 20, 45, 35, 14, 0, 61, 33, 97, 34, 31, 33, 95}, _
  13.                                {78, 17, 53, 28, 22, 75, 31, 67, 15, 94, 3, 80, 4, 62, 16, 14, 9, 53, 56, 92}, _
  14.                                {16, 39, 5, 42, 96, 35, 31, 47, 55, 58, 88, 24, 0, 17, 54, 24, 36, 29, 85, 57}, _
  15.                                {86, 56, 0, 48, 35, 71, 89, 7, 5, 44, 44, 37, 44, 60, 21, 58, 51, 54, 17, 58}, _
  16.                                {19, 80, 81, 68, 5, 94, 47, 69, 28, 73, 92, 13, 86, 52, 17, 77, 4, 89, 55, 40}, _
  17.                                {4, 52, 8, 83, 97, 35, 99, 16, 7, 97, 57, 32, 16, 26, 26, 79, 33, 27, 98, 66}, _
  18.                                {88, 36, 68, 87, 57, 62, 20, 72, 3, 46, 33, 67, 46, 55, 12, 32, 63, 93, 53, 69}, _
  19.                                {4, 42, 16, 73, 38, 25, 39, 11, 24, 94, 72, 18, 8, 46, 29, 32, 40, 62, 76, 36}, _
  20.                                {20, 69, 36, 41, 72, 30, 23, 88, 34, 62, 99, 69, 82, 67, 59, 85, 74, 4, 36, 16}, _
  21.                                {20, 73, 35, 29, 78, 31, 90, 1, 74, 31, 49, 71, 48, 86, 81, 16, 23, 57, 5, 54}, _
  22.                                {1, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 1, 89, 19, 67, 48}}
  23.     Sub Main()
  24.         For y = 0 To 19 : For x = 0 To 16
  25.                 Dim CrntVal As Integer = ((G(y, x) * G(y, x + 1)) * G(y, x + 2)) * G(y, x + 3)
  26.                 If CrntVal > R Then R = CrntVal
  27.             Next : Next
  28.         For x = 0 To 19 : For y = 0 To 16
  29.                 Dim CrntVal As Integer = ((G(y, x) * G(y + 1, x)) * G(y + 2, x)) * G(y + 3, x)
  30.                 If CrntVal > R Then R = CrntVal
  31.             Next : Next
  32.         For x = 0 To 16 : For y = 0 To 16
  33.                 Dim CrntVal As Integer = ((G(y, x) * G(y + 1, x + 1)) * G(y + 2, x + 2)) * G(y + 3, x + 3)
  34.                 If CrntVal > R Then R = CrntVal
  35.             Next : Next
  36.         For y = 0 To 16 : For x = 3 To 19
  37.                 Dim CrntVal As Integer = ((G(y, x) * G(y + 1, x - 1)) * G(y + 2, x - 2)) * G(y + 3, x - 3)
  38.                 If CrntVal > R Then R = CrntVal
  39.             Next : Next
  40.         Console.WriteLine(R)
  41.     End Sub
  42. End Module
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