#1302

Deepest Leaves Sum

pupil · 380 · lc medium +24 · verified · 86.5% accepted · 4,833 likes · top 97%

⚑ Recursive DFS Traversal ⚑ BFS / Level-Order Traversal

Description

Given the root of a binary tree, find all leaf nodes at the maximum depth and return the sum of their values.

Example 1:

Input: root = [1,2,3,4,5,null,6,7,null,null,null,null,8]

Output: 15

Example 2:

Input: root = [6,7,8,2,7,1,3,9,null,1,4,null,null,null,5]

Output: 19

Code

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, val=0, left=None, right=None):
#         self.val = val
#         self.left = left
#         self.right = right
class Solution:
    def deepestLeavesSum(self, root: Optional[TreeNode]) -> int:

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, val=0, left=None, right=None):
#         self.val = val
#         self.left = left
#         self.right = right
class Solution:
    def deepestLeavesSum(self, root: Optional[TreeNode]) -> int: