// -*- compile-command: "g++ -g pgcd.cc -lgiac -lgmp" -*-
  #include <giac/giac.h>
  
  using namespace std;
  using namespace giac;
  
  int main(){
    context ct;
    cout << "Enter two polynomials ";
    gen a,b;
    cin >> a >> b;
    cout << "PGCD is " << _gcd(makesequence(a,b),&ct) << endl;
    return 0;
  }