LeetCode Remove Duplicates from Sorted Array

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