Judge's notes for Jungle:

If you want to check out the final, most complicated graph by hand,
here is a text-graphic representation with a rectangle of 8 x 4
vertices joined horizontally, vertically, and diagonally from top left
to bottom right, and it wraps around the edges. All the top vertices
are linked to A and all the bottom ones to Z.

ORIGINAL  (left and right sides connect.  Vertices for opposite side
shown a second time in parentheses)

            ----------------A----------------
           /     /     /    |    \    \      \
          /     /     /     |     \    \      \
         /     /     /     / \     \    \      \
        /     /     /     /   \     \    \      \
 rt   17     41   18     42   19    43    20    44    to left end
 end   |     |     |     |     |     |     |     |    
(I)48 -B--1--C--4--D-45--E--7--F-46--G-10--H-47--I-48-(B)
 |\    |\    |\    |\    |\    |\    |\    |\    |\   
59 60 21 29 53 54 23 31 55 56 25 33 57 58 27 35 59 60 
 |    \|    \|    \|    \|    \|    \|    \|    \|   \
(Q)40 -J-37--K--2--L--5--M-38--N--8--O-39--P-11--Q-40-(J)
 |\    |\    |\    |\    |\    |\    |\    |\    |\   
67 68 22 30 61 62 24 32 63 64 26 34 65 66 28 36 67 68 
 |    \|    \|    \|    \|    \|    \|    \|    \|   \
(Y)12 -R-49--S-50--T--3--U--6--V-51--W--9--X-52--Y-12-(R)
        \     \      \    \   /     /     /     /
        13    69     14   70 15    71    16    72      
         \     \      \    \ /     /     /     /
          \     \      \    |     /     /     /
           -----------------Z----------------

MINIMAL SPANNING TREE
             ---------------A----------------
            /               |         \      \
           /                |          \      \
          /                  \          \      \
         /                    \          \      \
       17                     19          20    44               
       |                       |           |     |    
       B--1--C--4--D     E--7--F     G-10--H     I       
       |           |           |           |          
      21          23          25          27          
       |           |           |           |          
       J     K--2--L--5--M     N--8--O     P-11--Q       
       |\                                             
      22 30                                           
       |    \                                         
Y--12--R     S     T--3--U--6--V     W--9--X             
from    \           \                     /      
rt      13           14                  16            
         \            \                  /       
          \            \                /      
           -----------------Z-----------