26. Remove Duplicates from Sorted Array

//64ms
class Solution {
public:
int removeDuplicates(vector<int>& nums) {
if(!nums.size()) return 0;
for(auto a=nums.begin()+1;a!=nums.end();a++)
{
if(*a==*(a-1))
{
nums.erase(a);
a--;
}
}
return nums.size();
}
};
//32ms
class Solution {
public:
int removeDuplicates(vector<int>& nums) {
if(!nums.size()) return 0;
int cur=0;
for(auto a=nums.begin();a!=nums.end();a++)
{
if(*a>nums[cur])
{
nums[++cur]=*a;
}
}
return cur+1;
}
};