tree
|
nr(0)
/ \
/ \
n3(3) n4(4)
/ / \
n1(1) n5(5) n2(2)
/ \
n6(6) n7(7)
/ \
n8(8) n9(9)
|
tree2 | root(-1) |
null
|
lonelyNode0(100)
/
lonelyNode1(200)
|