/in/foo.cc: In function 'int main()':
/in/foo.cc:29:32: warning: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'long long unsigned int' [-Wformat=]
   if(x) printf("%ulld\n",b[n-2]);
                          ~~~~~~^
/in/foo.cc:30:31: warning: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'long long unsigned int' [-Wformat=]
   else printf("%ulld\n",a[n-2]);
                         ~~~~~~^