#include <iostream>
#include <vector>
 
template <typename T>
std::vector<typename T::iterator> f(T t)
{
        std::vector<typename T::iterator> v;
        for (auto i = t.begin(); i != t.end(); ++i)
        {
                v.push_back(i);
        }
        return v;
}
 
template <typename T>
void print(const std::vector<T>& v)
{
        for (auto i = v.begin(); i != v.end(); ++i)
        {
                std::cout << **i << ' ';
        }
        std::cout << std::endl;
}
 
int main()
{
        std::vector<int> v{1, 2, 3};
        print(f(v));
        std::vector<std::vector<int>::iterator> itervec = f(v);
        print(itervec);
}