#include <type_traits>
#include <iostream>
 
template<unsigned acc, char... values>
struct DJBhash_helper
     : std::integral_constant<unsigned, acc> {};
 
template<unsigned acc, char head, char... tail>
struct DJBhash_helper<acc, head, tail...>
     : DJBhash_helper<(acc << 5) + acc + head, tail...> {};
 
template<char... str>
struct DJBhash
     : DJBhash_helper<5381, str...> {};
 
int main()
{
    std::cout << DJBhash<'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                         '0', '1', '2', '3', '4', '5', '6', '7'>::value << '\n';
}
 

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