if left_list:
left_list[1].nxt = current
current.prv = left_list[1].nxt
new_start = left_list[0]
if right_list:
right_list[0].prv = current
current.nxt = right_list[0]
new_finish = right_list[1]
return new_start, new_finish
root = BstNode(10)
root.left = BstNode(5)
root.right = BstNode(15)
root.left.left = BstNode(2)
root.left.right = BstNode(7)
root.right.left = BstNode(12)
root.right.right = BstNode(17)
sorted_list = convert_bst_to_list(root)
pointer = sorted_list
while pointer:
print(pointer.value)
pointer = pointer.nxt
def common_ancestor_constant_space(root, first, second):
if root is None:
return None
if root.value == first or root.value == second:
return root
left = common_ancestor_constant_space(root.left, first, second)
right = common_ancestor_constant_space(root.right, first, second)
if left and right:
return root
return left if left is not None else right
root = BstNode(9)
root.left = BstNode(5)
root.right = BstNode(15)
root.left.left = BstNode(3)
root.left.right = BstNode(7)
root.right.left = BstNode(12)
root.right.right = BstNode(20)
print(common_ancestor_linear_space(root, 3, 7).value)
print(common_ancestor_constant_space(root, 3, 7).value)
if left_result.max <= result.min:
result.size += left_result.size
result.min = left_result.min
result.res = max(result.res, max(result.size, left_result.res))
if tree.right:
right_result = largest_bst_subtree(tree.right)
if right_result.min >= result.max:
result.size += right_result.size
result.max = right_result.max
result.res = max(result.res, max(result.size, right_result.res))
return result
root = BstNode(50)
root.left = BstNode(30)
root.right = BstNode(60)
root.left.left = BstNode(5)
root.left.right = BstNode(20)
root.right.left = BstNode(45)
root.right.right = BstNode(70)
root.right.right.left = BstNode(65)
root.right.right.right = BstNode(80)
print(largest_bst_subtree(root).res)
if left_result.max <= result.min:
result.size += left_result.size
result.min = left_result.min
result.res = max(result.res, max(result.size, left_result.res))
if tree.right:
right_result = largest_bst_subtree(tree.right)
if right_result.min >= result.max:
result.size += right_result.size
result.max = right_result.max
result.res = max(result.res, max(result.size, right_result.res))
return result
root = BstNode(50)
root.left = BstNode(30)
root.right = BstNode(60)
root.left.left = BstNode(5)
root.left.right = BstNode(20)
root.right.left = BstNode(45)
root.right.right = BstNode(70)
root.right.right.left = BstNode(65)
root.right.right.right = BstNode(80)
print(largest_bst_subtree(root).res)
