/in/foo.cc: In function '__int128 kxy(int)':
/in/foo.cc:30:17: warning: unused variable 'tt' [-Wunused-variable]
             int tt = l;
                 ^~
/in/foo.cc: At global scope:
/in/foo.cc:3:38: warning: 'pd' defined but not used [-Wunused-variable]
 static char buf[100000], *pa = buf, *pd = buf;
                                      ^~
/in/foo.cc:3:27: warning: 'pa' defined but not used [-Wunused-variable]
 static char buf[100000], *pa = buf, *pd = buf;
                           ^~