def main():
# array = [314, 6, 6, -1, 2, 2, -1, -1, -1, -1, 3, 3, -1]
array = [random.randint(0, 100) for x in range(0, 10)]
bt = BinaryTree(array)
inorder = bt.inorder()
print(inorder)
print(bt.preorder())
print(bt.postorder())
root = reconstruct_tree(bt.inorder(), bt.preorder())
print("after reconstruction")
print(BinaryTree.inorder_helper(root))
print(BinaryTree.preorder_helper(root))
print(BinaryTree.postorder_helper(root))
