/in/foo.cc: In function 'int main()':
/in/foo.cc:29:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long unsigned int' [-Wformat=]
   if(x) printf("%d\n",b[n-2]);
                       ~~~~~~^
/in/foo.cc:30:28: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long unsigned int' [-Wformat=]
   else printf("%d\n",a[n-2]);
                      ~~~~~~^