Updated how results are retrieved

Headers/Problem21.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
 	std::vector<uint64_t> getAmicable() const;	//Returns a vector with all of the amicable numbers calculated
 	uint64_t getSum() const;	//Returns the sum of all of the amicable numbers
 };