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Merge pull request #820 from casnz1601/patch-4

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Update 0404.左叶子之和.md
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程序员Carl
2021-10-10 08:43:24 +08:00
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parent 145b5b0c28 d131731015
commit 544a249d01
1 changed files with 7 additions and 7 deletions
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problems/0404.左叶子之和.md
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@ -171,10 +171,10 @@ class Solution {
int rightValue = sumOfLeftLeaves(root.right); // 右
int midValue = 0;
if (root.left != null && root.left.left == null && root.left.right == null) { // 中
if (root.left != null && root.left.left == null && root.left.right == null) {
midValue = root.left.val;
}
int sum = midValue + leftValue + rightValue;
int sum = midValue + leftValue + rightValue; // 中
return sum;
}
}
@ -230,8 +230,8 @@ class Solution {
## Python
**递归**
```python
**递归后序遍历**
```python3
class Solution:
def sumOfLeftLeaves(self, root: TreeNode) -> int:
if not root:
@ -242,13 +242,13 @@ class Solution:
cur_left_leaf_val = 0
if root.left and not root.left.left and not root.left.right:
cur_left_leaf_val = root.left.val # 中
cur_left_leaf_val = root.left.val
return cur_left_leaf_val + left_left_leaves_sum + right_left_leaves_sum
return cur_left_leaf_val + left_left_leaves_sum + right_left_leaves_sum # 中
```
**迭代**
```python
```python3
class Solution:
def sumOfLeftLeaves(self, root: TreeNode) -> int:
"""