#include <map>
#include <iostream>

template<class Range>
void go(Range &r)
{
  std::cout << "First" << std::endl;
}

template<class K, class V>
void go(const std::map<K, V> &m)
{
  std::cout << "Second" << std::endl;
}


int main()
{
  const std::map<int, int> m;
//^^^^^ note the const.  
  go(m);
}