/in/foo.cc: In function 'int main()':
/in/foo.cc:45:43: error: lvalue required as unary '&' operand
  fo(i,0,n-1) scanf("%lf%lf",&v[0][i].real(),&v[1][i].real());
                                           ^
/in/foo.cc:45:59: error: lvalue required as unary '&' operand
  fo(i,0,n-1) scanf("%lf%lf",&v[0][i].real(),&v[1][i].real());
                                                           ^