#include <iostream>
#include <list>
using namespace std;
int main() {
list <int> d1;
cout << sizeof(d1) << endl;
list <int>::iterator iter;
int i;
for (i = 0 ; i < 6; i++ )
d1.push_back(i);
for (i =10 ; i < 16; i++)
d1.push_front(i);
for (iter =d1.begin() ; iter != d1.end(); iter++)
cout << *iter;
cout << endl;
return 0;
}
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