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Author: assassint2017

Remove Element/Remove_Element.py

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+# 第一种思路，利用python
+# 36ms 99.79%
+class Solution:
+    def removeElement(self, nums, val):
+        """
+        :type nums: List[int]
+        :type val: int
+        :rtype: int
+        """
+        while val in nums:
+            nums.remove(val)
+        return len(nums)
+
+# 第二种思路，使用双指针法，控制程序的时间复杂度为线性
+# 40ms 77.81%
+class Solution:
+    def removeElement(self, nums, val):
+        """
+        :type nums: List[int]
+        :type val: int
+        :rtype: int
+        """
+        i, j = 0, len(nums) - 1
+        while i <= j :
+            if nums[i] == val:
+                nums[i], nums[j] = nums[j], nums[i]
+                j -= 1
+            else:
+                i += 1
+        return j + 1