/in/foo.cc: In function 'int initial(int)':
/in/foo.cc:21:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'long long int prim(int, int)':
/in/foo.cc:129:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.cc:115:23: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
             visit[ind]=true;
             ~~~~~~~~~~^~~~~
/in/foo.cc:78:23: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
             visit[ind]=true;
             ~~~~~~~~~~^~~~~