#include <map>
#include <string>
#include <vector>
#include <utility>
using namespace std;

template<typename T, typename U>
class my_map
{
	private:
		multimap<T,U> m;

	public:
		U& operator()(T t, unsigned i)
		{
			pair< typename multimap<T,U>::iterator, typename multimap<T,U>::iterator > ret = m.equal_range(t);
			typename multimap<T,U>::iterator it = ret.first;
			for(unsigned x=0; x!=i; ++x, ++it);
			return it->second;
		}
		void insert(T t, U u)
		{
			m.insert( make_pair(t,u) );
		}
};

int main()
{
	my_map<int,vector<string>> m;

	const char* s1[] = { "apfel", "birne" };
	vector<string> v1(s1,s1+2);
	m.insert(0,v1);

	const char* s2[] = { "hund", "katze", "maus" };
	vector<string> v2(s2,s2+3);
	m.insert(0,v2);

	const char* s3[] = { "pc", "cam", "tablet", "phone" };
	vector<string> v3(s3,s3+4);
	m.insert(1,v3);

	vector<string>& test_1 = m(0,0); // apfel, birne
	vector<string>& test_2 = m(0,1); // hund, katze, maus
	vector<string>& test_3 = m(1,0); // pc, cam, tablet, phone
}