/in/foo.cc: In function 'int main()':
/in/foo.cc:8:23: warning: unused variable 'c' [-Wunused-variable]
  long long a,b[15000],c;
                       ^
/in/foo.cc: In function 'long long int aa(long long int*, long long int)':
/in/foo.cc:29:9: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return f;
         ^