class Solution {
public:
int removeDuplicates(vector<int>& nums) {
int k =1;
int j=nums[0];
vector<int> nums2;
nums2.push_back(j);
for(int i =1;i<nums.size();i++)
{
if(j!=nums[i])
{
nums2.push_back(nums[i]);
j=nums[i];
k++;
}
}
nums=nums2;
return k;
}
};
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