Merge pull request #167 from charon2121/master

添加 94 144 145 python3版本
This commit is contained in:
Carl Sun
2021-05-17 23:58:52 +08:00
committed by GitHub

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@ -170,7 +170,53 @@ class Solution {
``` ```
Python Python
```python3
# 前序遍历-递归-LC144_二叉树的前序遍历
class Solution:
def preorderTraversal(self, root: TreeNode) -> List[int]:
# 保存结果
result = []
def traversal(root: TreeNode):
if root == None:
return
result.append(root.val) # 前序
traversal(root.left) # 左
traversal(root.right) # 右
traversal(root)
return result
# 中序遍历-递归-LC94_二叉树的中序遍历
class Solution:
def inorderTraversal(self, root: TreeNode) -> List[int]:
result = []
def traversal(root: TreeNode):
if root == None:
return
traversal(root.left) # 左
result.append(root.val) # 中序
traversal(root.right) # 右
traversal(root)
return result
# 后序遍历-递归-LC145_二叉树的后序遍历
class Solution:
def postorderTraversal(self, root: TreeNode) -> List[int]:
result = []
def traversal(root: TreeNode):
if root == None:
return
traversal(root.left) # 左
traversal(root.right) # 右
result.append(root.val) # 后序
traversal(root)
return result
```
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