/in/foo.cc: In function 'int main()':
/in/foo.cc:26:37: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<" "<<min<<" "<<x<<" "<<y;
                                     ^
/in/foo.cc:26:31: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<" "<<min<<" "<<x<<" "<<y;
                               ^~~