How to handle large numbers?

I observed that codechef problems some times has a challenge of handling large numbers. Is there any writing explainig how to handle them?

You can read this part of the FAQ- How can I store very very large integers accurately

If the number is less than 2^64, then you can use a long long.

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Hi You can use online resources for your handle large numbers problem. It is giving good and many helps for your code chef problems. Many resources providing lots of information about codings. It will give perfect solution for your writing problem.