function [ i, j, v ] = medium_st ( )

%*****************************************************************************80
%
%% medium_st() returns the medium web matrix in sparse triplet form.
%
%  Discussion:
%
%    316 nodes, 431 links.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    24 September 2022
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer i(431), j(431), v(431): the sparse triplet information.
%
  i = [ ...
  74,  34,  49,  15,  18,  21,  22,  46,  54,  79, ...
  84,  37,  82,  38,  57,  71,   6,   9,  37,  55, ...
  60,  33,  46,  73,  74,  33,  56,   7,  69,  70, ...
  14,  58,  61,  83,  85,  27,   2,  14,  43,  45, ...
  48,  71,  19,  20,  60,  79,   6,  35,  48,  45, ...
  86,  44,  71,  21,  78,  35,  43,  11,  15,  46, ...
  79,  81,  84,  78,   7,  25,  29,  19,  82,  21, ...
  30,  35,  43,  48,  67,  73,  86,  34,  24,  29, ...
  58,  28,  70,  80,  28,  36,  69,  76,  45,  83, ...
  37,  11,  12,  14,  17,  21,  22,  29,  30,  35, ...
  42,  43,  44,  45,  46,  48,  62,  63,  67,  72, ...
  74,  78,  81,  82,  86,   1,  49,  16,  55,  80, ...
  41,  46,  73,  12,  19,  37,  60,  71,  54,   2, ...
   4,  44,  45,  78,   9,  63,  81,  50,   9,  47, ...
  30,  28,  69,   2,  10,  75,  51,  36,  52,   4, ...
  19,  55,  60,  27,  31,   6,  13,  14,  71,  24, ...
  18,  35,  43,  44,  86,  75,  12,  19,  25,  37, ...
  55,  60,  78,  80,  82,  41,  15,   3,  10,  38, ...
  39,  75,  49,   7,  50,   8,  53,  76,  23,  22, ...
  38,  65,  13,  42,  54,  84,   1,   7,  12,  80, ...
  69,  75,  65,  67,  59,  13,  18,  44,  86,  62, ...
  39,  25,  56,  42,  53,  32,  58,  27,  66,  47, ...
  38,  85,   4,  10,  40,  68,  52,  65,  76,  79, ...
  33,  26,  20,  34,  34,  66,  82,  29,  58,  53, ...
  10,  22,  62,  26,  85,  66,  61,  26,  77,  33, ...
  30,  52,  36,  57,  68,   5,  76,  70,  39,  57, ...
  61,  23,   4,  32,  73,  81,   1,   5,  74,   3, ...
  32,  40,  80,   5,  32,  81,  70,  68,   6,  23, ...
  41,  17,  36,  29,  58,  64,  83,  85,  17,  53, ...
  50,  11,   2,  85,  39,   3,  70,  68,  72,   4, ...
  54,  84,  63,  59,   8,  41,  33,  51,  25,  56, ...
  61,  83,   2,  65,  51,  27,  77,  84,  72,   3, ...
   9,  47,  77,  57,  42,  72,   8,  41,  13,   9, ...
  26,  16,  63,  56,  23,  52,  59,  17,  40,  67, ...
   7,  25,  56,  61,  16,   8,  38,  63,  59,   8, ...
  24,  47,  31,  51,  52,  55,  74,  16,  51,   1, ...
  76,  31,  18,   6,  21,  62,  73,  77,  14,  10, ...
  49,  24,  32,  77,  40,  40,  53,  68,  50,   5, ...
  24,  28,   5,  16,  20,  66,  11,  79,  75,  18, ...
  64,  83,  26,  20,  28,  72,   1,  31,  12,   3, ...
  20,  31,  65,  17,  67,  39,  30,  22,  64,  49, ...
  54,  64,  13,  66,  50,  11,  15,  48,  62,  59, ...
  23,  69,  15,  42,  27,  34,  64,  57,  47,  36, ...
 316 ];

  j = [ ...
   1,   2,  10,  11,  11,  11,  11,  11,  11,  11, ...
  11,  12,  12,  13,  13,  14,  18,  18,  19,  19, ...
  19,  21,  21,  21,  21,  25,  25,  28,  28,  28, ...
  29,  29,  29,  29,  29,  31,  34,  35,  35,  35, ...
  35,  35,  37,  37,  37,  41,  43,  43,  43,  44, ...
  44,  45,  45,  46,  46,  48,  48,  54,  54,  54, ...
  54,  54,  54,  55,  56,  56,  58,  60,  60,  62, ...
  62,  62,  62,  62,  62,  62,  62,  63,  64,  64, ...
  64,  69,  69,  69,  70,  70,  70,  70,  71,  71, ...
  72,  73,  73,  73,  73,  73,  73,  73,  73,  73, ...
  73,  73,  73,  73,  73,  73,  73,  73,  73,  73, ...
  73,  73,  73,  73,  73,  74,  77,  78,  78,  78, ...
  79,  81,  81,  82,  82,  82,  82,  83,  84,  86, ...
  86,  86,  86,  86,  87,  88,  88,  89,  90,  90, ...
  91,  92,  92,  93,  93,  93,  94,  95,  96,  97, ...
  98,  98,  98,  99,  99, 100, 100, 100, 100, 101, ...
 102, 102, 102, 102, 102, 103, 104, 104, 104, 104, ...
 104, 104, 104, 104, 104, 105, 106, 107, 108, 109, ...
 110, 111, 112, 113, 114, 115, 116, 116, 117, 118, ...
 119, 120, 121, 122, 123, 123, 124, 125, 126, 127, ...
 128, 129, 130, 131, 132, 133, 134, 134, 134, 135, ...
 136, 137, 137, 138, 139, 140, 141, 142, 143, 144, ...
 145, 146, 147, 147, 147, 148, 149, 149, 149, 150, ...
 151, 152, 153, 153, 154, 155, 155, 156, 156, 157, ...
 158, 159, 159, 160, 160, 161, 162, 163, 164, 165, ...
 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, ...
 175, 176, 177, 177, 178, 178, 179, 179, 179, 180, ...
 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, ...
 191, 192, 193, 194, 194, 194, 194, 194, 195, 196, ...
 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, ...
 207, 207, 208, 209, 210, 211, 212, 213, 214, 214, ...
 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, ...
 224, 224, 225, 226, 227, 227, 228, 229, 230, 231, ...
 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, ...
 242, 243, 243, 243, 244, 245, 246, 247, 248, 249, ...
 250, 251, 252, 253, 254, 254, 255, 256, 257, 258, ...
 258, 259, 260, 261, 261, 261, 261, 262, 263, 264, ...
 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, ...
 274, 275, 276, 277, 278, 279, 280, 280, 281, 282, ...
 283, 283, 284, 285, 286, 287, 288, 289, 290, 291, ...
 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, ...
 302, 303, 304, 305, 306, 307, 307, 307, 307, 308, ...
 309, 310, 311, 312, 313, 313, 313, 314, 315, 316, ...
 316 ];
  v = [ ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1,   1,   1,   1,   1,   1,   1,   1,   1,   1, ...
   1 ];

  return
end

