/in/foo.cc: In function 'int main()':
/in/foo.cc:9:6: warning: unused variable 'max' [-Wunused-variable]
  int max,mid,min;
      ^
/in/foo.cc:9:10: warning: unused variable 'mid' [-Wunused-variable]
  int max,mid,min;
          ^
/in/foo.cc:9:14: warning: unused variable 'min' [-Wunused-variable]
  int max,mid,min;
              ^