/in/foo.cc: In function 'int main()':
/in/foo.cc:79:82: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
             else printf("%d\n",(t*quick(b,p-2,p)+1)==p ? p:(t*quick(b,p-2,p)+1)%p);
                                                                                  ^
/in/foo.cc:77:21: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
             int t=(t-x1+p)%p;
                    ~^~~