#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
 int a[6] = {1,1,4,6,6,7};
 int *p = unique(a,a+6);
 cout << &a[4] << endl;
 cout << p << endl;
 cout << p - a <<endl;
 for(int i = 0;i < p-a;i++)
 {
  cout << a[i] << endl;
 }
 return 0;
}

#include <iostream>
#include <algorithm>
#include <vector> 
using namespace std;
int main()
{
 vector<int> v;
 v.push_back(1);
 v.push_back(1);
 v.push_back(4);
 v.push_back(6);
 v.push_back(6);
 v.push_back(7);
 vector<int>::iterator it = unique(v.begin(),v.end());
 cout<< v.size() <<endl;
 v.erase(it,v.end());
 for(it = v.begin();it != v.end();it++)
 {
  cout << *it << " "; 
 } 
 return 0;
}