stack, ans = list(), list()
i = 0
if A:
stack.append(A)
while stack:
node = stack[-1]
if not node.left or hasattr(node.left, 'visitedp'):
if not node.right or hasattr(node.right, 'visitedp'):
ans.append(stack.pop().val)
node.visitedp = True
else:
stack.append(node.right)
else:
stack.append(node.left)
return ans
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
if __name__ == '__main__':
# Input DATA to practice: 11 2 9 13 57 25 17 1 90 3
r = TreeNode(int(sys.argv[1]))
for arg in range(2, len(sys.argv), 1):
insertNode(r, TreeNode(int(sys.argv[arg])))
s = Solution()
L = s.postorderTraversal(r)
print("Post Order Traversal: {}".format(L))
# def __init__(self, x):
# self.val = x
# self.left = None
# self.right = None
class Solution(object):
# @param A : root node of tree
# @return an integer
def maxDepth(self, A):
if A is None:
return 0
return max(self.maxDepth(A.left), self.maxDepth(A.right)) + 1
def minDepth(self, root):
if not root:
return 0
if not root.left:
return self.minDepth(root.right) + 1
elif not root.right:
return self.minDepth(root.left) + 1
else:
return min(self.minDepth(root.left), self.minDepth(root.right)) + 1
if __name__ == '__main__':
r = TreeNode(1)
insertNode(r, TreeNode(2))
s = Solution()
print(s.maxDepth(r))
print(s.minDepth(r))
if root is None:
return 0
else:
return 1 + max(getHight(root.left), getHight(root.right))
def isAvl(root):
if root:
h = abs(getHight(root.left) - getHight(root.right))
if h > 1:
return False
else:
isAvl(root.left)
isAvl(root.right)
return True
t = None
t = insertNode(t, 5)
t = insertNode(t, 3)
t = insertNode(t, 10)
t = insertNode(t, 2)
t = insertNode(t, 4)
t = insertNode(t, 0)
t = insertNode(t, 1)
t = insertNode(t, -1)
#t=insertNode(t,-2)
t = insertNode(t, 6)
t = insertNode(t, 11)
print(isAvl(t))
from BST import Node from BST import insertNode from BST import Display from BST import deleteNode t = None t = insertNode(t, 12) t = insertNode(t, 32) t = insertNode(t, 2) t = insertNode(t, 24) t = insertNode(t, 3) t = insertNode(t, 36) t = insertNode(t, 0) Display(t) t = deleteNode(t, 12) Display(t) t = deleteNode(t, 2) Display(t) t = deleteNode(t, 0) Display(t) t = deleteNode(t, 36) Display(t)