foo.cc: In function ‘int main()’:
foo.cc:15:37: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=]
   15 |                 if (i == n)printf("%d ", x);
      |                                    ~^    ~
      |                                     |    |
      |                                     int  long long int
      |                                    %lld