Python Day 23: BST Level-Order Traversal
A level-order traversal, also known as a breadth-first search, visits each level of a tree's nodes from left to right, top to bottom. You are given a pointer, root, pointing to the root of a binary search tree. Complete the levelOrder function provided in your editor so that it prints the level-order traversal of the binary search tree.
- import sys
-
- class Node:
- def __init__(self,data):
- self.right=self.left=None
- self.data = data
- class Solution:
- def insert(self,root,data):
- if root==None:
- return Node(data)
- else:
- if data<=root.data:
- cur=self.insert(root.left,data)
- root.left=cur
- else:
- cur=self.insert(root.right,data)
- root.right=cur
- return root
-
- from collections import deque
- def levelOrder(self,root):
-
- queue = self.deque([root]) if root else self.deque()
-
- while queue:
- node = queue.popleft()
- print(node.data, end=' ')
-
- if node.left: queue.append(node.left)
- if node.right: queue.append(node.right)
-
- T=int(input())
- myTree=Solution()
- root=None
- for i in range(T):
- data=int(input())
- root=myTree.insert(root,data)
- myTree.levelOrder(root)
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