/in/foo.cc: In function 'int main()':
/in/foo.cc:8:33: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
 #define out(a) printf("%lld\n",a)
                                 ^
/in/foo.cc:57:5: note: in expansion of macro 'out'
     out(ans);
     ^~~