new: 8
insert 7 2 1
insert 2 1 1
insert 1 7 0
insert 7 3 1
connected 7 1 1
connected 1 7 0
adjacent 7 1 0
adjacent 7 2 1
adjacent 1 7 0
adjacent 2 7 0
connected 1 1 1
adjacent 1 1 0
sort
set 3 0.5 1
clear
sort
insert 7 2 1
insert 2 1 1
insert 7 3 1
insert 2 5 1
insert 5 3 1
insert 4 5 1
insert 4 6 1
sort
delete
summary