function tile_num = boat_tile_num ( )

%*****************************************************************************80
%
%% boat_tile_num() returns the number of tiles in the boat puzzle.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    16 November 2021
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer TILE_NUM: the number of tiles in the puzzle.
%
    tile_num = 21;

  return
end

