00002

力扣 27 快慢指针

class Solution(object):
    def removeElement(self, nums, val):
        k = 0
        low = 0
        fast = 1 
        while low < len(nums) :
            if nums[low] != val:
                nums[k] = nums[low]
                k += 1
            low += 1
            fast += 1
        return k