/in/foo.cc: In function 'int main()':
/in/foo.cc:15:19: warning: format '%lld' expects argument of type 'long long int*', but argument 2 has type 'long long int' [-Wformat=]
   15 |         scanf("%lld", x);
      |                ~~~^   ~
      |                   |   |
      |                   |   long long int
      |                   long long int*
/in/foo.cc:15:14: warning: 'x' is used uninitialized [-Wuninitialized]
   15 |         scanf("%lld", x);
      |         ~~~~~^~~~~~~~~~~
/in/foo.cc:14:19: note: 'x' was declared here
   14 |         long long x;
      |                   ^