leetcode1302

 1 class Solution:
 2     def levelOrder(self,root,l,res):
 3         while len(l) > 0:
 4             temp = []
 5             while len(l) > 0:
 6                 cur = l.pop()
 7                 if cur.left != None:
 8                     temp.append(cur.left)
 9                 if cur.right != None:
10                     temp.append(cur.right)
11             if len(temp) > 0:
12                 l = temp[:]
13                 res.clear()
14                 for t in range(len(temp)):
15                     res.append(temp[t].val)
16                 
17         
18     def deepestLeavesSum(self, root: ‘TreeNode‘) -> int:
19         if root == None:
20             return 0
21         l = [root]
22         res = [root.val]
23         self.levelOrder(root,l,res)
24         sums = 0
25         for i in range(len(res)):
26             sums += res[i]
27         return sums