#include <iostream>

struct A {
  virtual int f(int) {
      return 1;
  }
};

struct B : A {
  template <typename T>
  int f(T) {
    return 2;
  }
};

int main(int argc, char**argv) {
  A* pa = new B;

  std::cout << pa->f(1) << '\n';

  delete pa;
  return 0;
}