def main():
tree = BST()
N = 11
_set = set([random.randint(1, N * N) for _ in range(N)])
for x in _set:
tree.insert(x, "")
print "original tree"
tree.pretty_print()
inorder = [node.key for node in tree.inorder_nodes()]
preorder = [node.key for node in tree.preorder_nodes()]
# now build a new tree from these traversals
root = binary_tree_from_traversals(preorder, inorder)
new_tree = BST()
new_tree.root = root
print "reconstructed tree"
new_tree.pretty_print()
# verify the correctness
for orig_node, cloned_node in zip(tree.levelorder_nodes(),
new_tree.levelorder_nodes()):
assert orig_node is not cloned_node
assert orig_node.key == cloned_node.key
def main():
N = 22
arr = sorted([random.randint(1, N * N) for _ in range(N)])
print arr
root = balanced_bst_from_sorted_array(arr, 0, len(arr) - 1)
tree = BST()
tree.root = root
tree.pretty_print()
inorder = [node.key for node in tree.inorder_nodes()]
assert arr == inorder