Updated result to function

Problems/Problem.py

@@ -33,7 +33,6 @@ class Problem(metaclass=abc.ABCMeta):
 	def __init__(self, description: str):
 		#Instance variables
 		self.timer = Stopwatch()
-		self.result = ""
 		self.description = description
 		self.solved = False
 	#Gets
@@ -41,11 +40,9 @@ class Problem(metaclass=abc.ABCMeta):
 	def getDescription(self) -> str:
 		return self.description
 	#Returns the result of solving the problem
+	@abc.abstractmethod
 	def getResult(self) -> str:
-		#If the problem hasn't been solved throw an exception
-		if(not self.solved):
-			raise Unsolved("You must solve the problem before you can see the result")
-		return self.result
+		pass
 	#Returns the time taken to run the problem as a string
 	def getTime(self) -> str:
 		#If the problem hasn't been solved throw an exception