/in/foo.cc: In function 'int main()':
/in/foo.cc:73:49: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
         printf("%d", (ll)4 * pow(3, m - 1) % mod);
                                                 ^
/in/foo.cc:82:56: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d", (ll)4 * dfs(2) % mod * pow(3, k) % mod);
                                                        ^