$ ./main
 digit:           3 , str:__-11__
 digit:           3 , str:__-10__
 digit:           2 , str:__-9__
 digit:           2 , str:__-8__
 digit:           2 , str:__-7__
 digit:           2 , str:__-6__
 digit:           2 , str:__-5__
 digit:           2 , str:__-4__
 digit:           2 , str:__-3__
 digit:           2 , str:__-2__
 digit:           2 , str:__-1__
 digit:           1 , str:__0__
 digit:           1 , str:__1__
 digit:           1 , str:__2__
 digit:           1 , str:__3__
 digit:           1 , str:__4__
 digit:           1 , str:__5__
 digit:           1 , str:__6__
 digit:           1 , str:__7__
 digit:           1 , str:__8__
 digit:           1 , str:__9__
 digit:           2 , str:__10__