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Update 0257.二叉树的所有路径.md

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jianghongcheng
2023-05-22 19:04:11 -05:00
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problems/0257.二叉树的所有路径.md
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@ -470,7 +470,7 @@ class Solution {
## Python: ## Python:
递归法+回溯（版本一） 递归法+回溯
```Python ```Python
# Definition for a binary tree node. # Definition for a binary tree node.
class Solution: class Solution:
@ -561,16 +561,11 @@ class Solution:
迭代法： 迭代法：
```Python ```Python
from collections import deque
class Solution: class Solution:
"""二叉树的所有路径 迭代法"""
def binaryTreePaths(self, root: TreeNode) -> List[str]: def binaryTreePaths(self, root: TreeNode) -> List[str]:
# 题目中节点数至少为1 # 题目中节点数至少为1
stack, path_st, result = deque([root]), deque(), [] stack, path_st, result = [root], [str(root.val)], []
path_st.append(str(root.val))
while stack: while stack:
cur = stack.pop() cur = stack.pop()