/in/foo.c: In function 'main':
/in/foo.c:22:12: warning: unused variable 'low' [-Wunused-variable]
  const int low  = 28679681;
            ^~~
/in/foo.c:21:12: warning: unused variable 'high' [-Wunused-variable]
  const int high = 28679678;
            ^~~~