[Tutor] how to handle very large numbers

[Surya K]

Well, 
I have been doing a puzzle where I have to deal with number 10^18. A variable can store that value but can't do operations.Ex: If I use range() on it, it shows overflow error.
So, How do I handle this. I have to use range() for that number.. in this instance.
Also mention how to handle in other cases too (A small tutorial/ book would be appreciated )

Thanks 		 	   		  
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