5 7 nodes edges

0 1 1.0
0 3 9.0
0 4 2.0
1 2 3.0
1 3 7.0
2 3 2.0
2 4 3.0

0.9 3.5 5.0 2.0   distances to 0
2.5 4.0 2.0       distances to 1
1.8 2.5           distances to 2
2.0               distances to 3

A B C D E    the names