/in/foo.cc: In function 'int main()':
/in/foo.cc:21:28: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<" "<<mid<<" "<<min<<endl;
                            ^~~
/in/foo.cc:21:23: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<" "<<mid<<" "<<min<<endl;
                       ^~~
/in/foo.cc:21:13: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<" "<<mid<<" "<<min<<endl;
             ^~~