Updated how results are retrieved

Headers/Problem16.hpp

@@ -49,7 +49,6 @@ public:
 	virtual void solve();	//Solve the problem
 	virtual void reset();	//Reset the problem so it can be run again
 	//Gets
-	virtual std::string getString() const;	//Return a string with the solution to the problem
 	mpz_class getNumber() const;	//Returns the number that was calculated
 	int getSum() const;		//Return the sum of the digits of the number
 };