题解 | #删除升序数组的重复元素(二)#

python 语言用for循环边遍历边删除，用逆序或者切片的方式，可以通过小数据量的用例，有一个十万个元素的用例运行超时了。

class Solution:
    def removenums(self , nums: List[int]) -> int:
        n = len(nums)
        cur = nums[-1]
        count = 1
        for i in range(n-2,-1,-1):
            if nums[i] == cur:
                count += 1
                if count >= 3:
                    nums.remove(nums[i])
            else:
                cur = nums[i]
                count = 1
        return len(nums)

class Solution:
    def removenums(self , nums: List[int]) -> int:
        cur = nums[0]
        count = 1
        for i in nums[1:]:
            if i == cur:
                count += 1
                if count >= 3:
                    nums.remove(i)
            else:
                cur = i
                count = 1
        return len(nums)