Commit bc1c0fe

authored

Create Binary_Tree_Level_Order_Traversal.py

1 parent 47975cf commit bc1c0feCopy full SHA for bc1c0fe

File tree

+27

-0

lines changed

+27

-0

lines changed

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+class Solution:`
	`2`	`+ def levelOrder(self, root: Optional[TreeNode]) -> List[List[int]]:`
	`3`	`+ if not root:`
	`4`	`+ return None`
	`5`	`+ q = [root]`
	`6`	`+ sep = '$'`
	`7`	`+ ans = []`
	`8`	`+ q.append(sep)`
	`9`	`+ res = []`
	`10`	`+ prev = -1`
	`11`	`+ while q:`
	`12`	`+ temp = q.pop(0)`
	`13`	`+ if prev == temp:`
	`14`	`+ break`
	`15`	`+ if temp != sep:`
	`16`	`+ res.append(temp.val)`
	`17`	`+ if temp.left:`
	`18`	`+ q.append(temp.left)`
	`19`	`+ if temp.right:`
	`20`	`+ q.append(temp.right)`
	`21`	`+ else:`
	`22`	`+ ans.append(list(res))`
	`23`	`+ res = []`
	`24`	`+ q.append(sep)`
	`25`	`+ prev = temp`
	`26`	`+`
	`27`	`+ return ans`

Comments

(0)