remove_duplicates_from_sorted_array.cpp

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        if(nums.size() < 2) return nums.size();
        int remove = 1;
        for(int i=1; i<nums.size(); i++) {
            if(nums[i] != nums[i-1]) {
                nums[remove] = nums[i];
                remove++;    
            }
        }
        return remove;
    }
};