#include <iostream>
#include <vector>
#include <typeinfo>
using namespace std;
template <class T>
void foo(T oh)
{
vector<int> s;
vector<vector<int> > d;
if (typeid(s) == typeid(T)) {
cout << "s" << endl;
} else if (typeid(d) == typeid(T)) {
cout << "d" << endl;
} else {
cout << "oops" << endl;
}
}
int main(void)
{
vector<int> bar1; bar1.push_back(8);
vector<vector<int> > bar2; bar2.push_back(bar1);
foo<vector<int> >(bar1);
foo<vector<vector<int> > >(bar2);
return 0;
}