Remove duplicates from sorted array.cpp

#include <bits/stdc++.h>
using namespace std;

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        if(nums.size()==0) return 0;
        int i = 0;
        for(int j=1;j<nums.size();j++){
            if(nums[j]!=nums[i]){
                i++;
                nums[i] = nums[j];
            }
        }
        return i+1;
    }
};