/in/foo.cc: In function 'int main()':
/in/foo.cc:29:52: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
     printf("%lld\n",dfs(x[1],x[2],x[3],x[4],x[5],0));
                                                    ^