26. Remove Duplicates from Sorted Array

Easy
我two pointers跟废了一样，这种easy题都不会，真的够了。

class Solution {
    public int removeDuplicates(int[] nums) {
        int len = nums.length; 
        int index = 1;
        for (int i = 1; i < len; i++){
            if (nums[i] != nums[i - 1]){
                nums[index++] = nums[i];
            }
        }
        return index;
    }
}