This represents the values inserted in this order
45 15 85 75 55 70 95 25 60 50 90 40 80 35 20 10 5 65 30
Note: the tree is 7 nodes high, at most 7 comparisons to search 20 items. This is not great but a significant improvement over 20 comparisons
Note: after level 4 the tree becomes unbalanced