/in/foo.cc: In function 'int main()':
/in/foo.cc:29:21: warning: unused variable 'xx' [-Wunused-variable]
   29 |                 int xx=find(x),yy=find(y);
      |                     ^~
/in/foo.cc:29:32: warning: unused variable 'yy' [-Wunused-variable]
   29 |                 int xx=find(x),yy=find(y);
      |                                ^~