class Solution:
    def removeDuplicates(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        for i in range(len(nums)-1,0,-1):
            if nums[i] == nums[i-1]:
                nums.remove(nums[i-1])
        print(nums)

public int RemoveDuplicates(int[] nums) {
        int i = 0;
        if (nums.Length == 0) return 0;
        for (int j = 1; j < nums.Length; j++)
        {
               if (nums[j] != nums[i])
                {
                    i++;
                    nums[i] = nums[j];
                }
         }
         i++;
         return i;
    }