#ifndef HASH_UTILITY_H
#define HASH_UTILITY_H

#include <iostream>
#include <cstdlib> 
#include <ctime> 
#include <math.h>

using namespace std;

class sum_of_components_hash{ 
    public:
    std::size_t operator () (const string & str) const;
};


class polynomial_hash{
   public:
   polynomial_hash();

   polynomial_hash(int a):a_(a){}

   std::size_t operator () (const string & str) const;

   private:
	int a_;
};	

class cyclic_hash{
   public:
   cyclic_hash();
   
   cyclic_hash(int sh):sh_(sh){}

   std::size_t operator() (const string & str) const;

   private:
        int sh_;
};


#endif