/in/foo.cc: In member function 'void BN::out()':
/in/foo.cc:22:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
  void out(){printf("%d",num[len]);for(int i=len-1;i>=0;i--) printf("%08d",num[i]);}
                                 ^
/in/foo.cc:22:81: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
  void out(){printf("%d",num[len]);for(int i=len-1;i>=0;i--) printf("%08d",num[i]);}
                                                                                 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:84:6: warning: unused variable 'i' [-Wunused-variable]
  int i;
      ^