From cd29a919d7e83cfbc853380ca2bb250d49d87efe Mon Sep 17 00:00:00 2001
From: LiangDazhu <42199191+LiangDazhu@users.noreply.github.com>
Date: Sun, 23 May 2021 20:21:40 +0800
Subject: [PATCH] =?UTF-8?q?Update=200968.=E7=9B=91=E6=8E=A7=E4=BA=8C?=
 =?UTF-8?q?=E5=8F=89=E6=A0=91.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Added python version code
---
 problems/0968.监控二叉树.md | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/problems/0968.监控二叉树.md b/problems/0968.监控二叉树.md
index 24695da9..8f1a3fdb 100644
--- a/problems/0968.监控二叉树.md
+++ b/problems/0968.监控二叉树.md
@@ -346,8 +346,27 @@ class Solution {
 
 
 Python：
-
-
+```python
+class Solution:
+    def minCameraCover(self, root: TreeNode) -> int:
+        result = 0
+        def traversal(cur):
+            nonlocal result
+            if not cur:
+                return 2
+            left = traversal(cur.left)
+            right = traversal(cur.right)
+            if left == 2 and right == 2:
+                return 0
+            elif left == 0 or right == 0:
+                result += 1
+                return 1
+            elif left == 1 or right == 1:
+                return 2
+            else: return -1
+        if traversal(root) == 0: result += 1
+        return result
+```
 Go：