From 6772a996bba54cf0741b53a5306a51d5664ffadd Mon Sep 17 00:00:00 2001
From: wangshihua <wangsh.a0bb@gmail.com>
Date: Wed, 16 Nov 2022 09:27:42 +0800
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---
 problems/0027.移除元素.md | 38 ++++++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/problems/0027.移除元素.md b/problems/0027.移除元素.md
index e1de7243..35d0e2c4 100644
--- a/problems/0027.移除元素.md
+++ b/problems/0027.移除元素.md
@@ -77,7 +77,7 @@ public:
 
 双指针法（快慢指针法）： **通过一个快指针和慢指针在一个for循环下完成两个for循环的工作。**
 
-定义快慢指针 
+定义快慢指针
 
 * 快指针：寻找新数组的元素 ，新数组就是不含有目标元素的数组
 * 慢指针：指向更新 新数组下标的位置
@@ -196,26 +196,44 @@ class Solution {
 
 Python：
 
-```python3
+```python 3
 class Solution:
     def removeElement(self, nums: List[int], val: int) -> int:
-        if nums is None or len(nums)==0: 
-            return 0 
+        if nums is None or len(nums)==0:
+            return 0
         l=0
         r=len(nums)-1
-        while l<r: 
+        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: 
+        if nums[l]==val:
+            return l
+        else:
             return l+1
 ```
 
+``` python 3
+class Solution:
+    def removeElement(self, nums: List[int], val: int) -> int:
+        # 快慢指针
+        fast = 0  # 快指针
+        slow = 0  # 慢指针
+        size = len(nums)
+        while fast < size:  # 不加等于是因为，a = size 时，nums[a] 会越界
+            # slow 用来收集不等于 val 的值，如果 fast 对应值不等于 val，则把它与 slow 替换
+            if nums[fast] != val:
+                nums[slow] = nums[fast]
+                slow += 1
+            fast += 1
+        return slow
+```
+
+
+
 
 Go：
 ```go
@@ -268,7 +286,7 @@ Ruby:
 ```ruby
 def remove_element(nums, val)
     i = 0
-    nums.each_index do |j| 
+    nums.each_index do |j|
         if nums[j] != val
             nums[i] = nums[j]
             i+=1
@@ -342,7 +360,7 @@ int removeElement(int* nums, int numsSize, int val){
         if(nums[fast] != val) {
             //将其挪到慢指针指向的位置，慢指针+1
             nums[slow++] = nums[fast];
-        } 
+        }
     }
     //最后慢指针的大小就是新的数组的大小
     return slow;