From cbe3bcf50a8633b2c07ff92b86b7bd9780d62848 Mon Sep 17 00:00:00 2001
From: Yuhao Ju <juguaguaji@gmail.com>
Date: Tue, 22 Nov 2022 10:13:52 +0800
Subject: [PATCH] =?UTF-8?q?update=20027.=E7=A7=BB=E9=99=A4=E5=85=83?=
 =?UTF-8?q?=E7=B4=A0=20python=E4=BB=A3=E7=A0=81?=
MIME-Version: 1.0
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---
 problems/0027.移除元素.md | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/problems/0027.移除元素.md b/problems/0027.移除元素.md
index e1de7243..a563a13f 100644
--- a/problems/0027.移除元素.md
+++ b/problems/0027.移除元素.md
@@ -199,21 +199,15 @@ Python：
 ```python3
 class Solution:
     def removeElement(self, nums: List[int], val: int) -> int:
-        if nums is None or len(nums)==0: 
-            return 0 
-        l=0
-        r=len(nums)-1
-        while l<r: 
-            while(l<r and nums[l]!=val):
-                l+=1
-            while(l<r and nums[r]==val):
-                r-=1
-            nums[l], nums[r]=nums[r], nums[l]
-        print(nums)
-        if nums[l]==val: 
-            return l 
-        else: 
-            return l+1
+        # 快指针遍历元素
+        fast = 0
+        # 慢指针记录位置
+        slow = 0
+        for fast in range(len(nums)):
+            if nums[fast] != val:
+                nums[slow] = nums[fast]
+                slow += 1
+        return slow
 ```