/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:17:26: error: 'setpricision' was not declared in this scope
   17 |         cout << fixed << setpricision(4) << ans << endl;
      |                          ^~~~~~~~~~~~