new: 4
edge_count 0
mst 0 0
insert 0 1 3.5
edge_count 1
is_connected 0
insert 0 2 4.5
mst 0 8
mst 3 0
is_connected 0
insert 2 3 5.5
is_connected 1
mst 0 13.5
insert 1 3 2.5
mst 0 10.5
insert 2 3 1.5
mst 0 7.5
insert 2 3 0
mst 0 10.5
is_connected 1
insert 1 3 0
is_connected 0
insert 0 1 0
is_connected 0
delete
summary