/in/foo.cc: In function 'int main()':
/in/foo.cc:64:19: error: 'lltoa' was not declared in this scope
     lltoa(n, s, 10);
                   ^
/in/foo.cc:76:23: warning: format '%d' expects argument of type 'int', but argument 2 has type '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' [-Wformat=]
     printf("%d ", v[i]);
                       ^
/in/foo.cc:78:27: warning: format '%d' expects argument of type 'int', but argument 2 has type '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' [-Wformat=]
    printf("%d\n", v[cnt-1]);
                           ^