[leetcode 26]Remove Duplicates from Sorted Array

class Solution {
public:
int removeDuplicates(vector<int>& nums) {
vector<int>::iterator it;
if(nums.empty())
return 0;
for(it = nums.begin()+1; it != nums.end();)
if(*(it-1) == *it){
it = nums.erase(it);
}
else{
it++;
}

return nums.size();
}

};