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목록Sum Root to Leaf Numbers (1)
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LeetCode: 129. Sum Root to Leaf Numbers
DFS로 푼다. # 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 sumNumbers(self, root: Optional[TreeNode]) -> int: self.sum = 0 self.dfs(root, '0') return self.sum def dfs(self, node, num: str): if node.left == None and node.right == None: self.sum += int(num + str(nod..
Computer Science/Coding Test
2021. 11. 10. 20:36