Editorial for Bedan Contest #05 - D - Phép cộng

Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.

Submitting an official solution before solving the problem yourself is a bannable offence.

Authors: flo

Bài này quá cơ bản nên không viết cách giải, bạn tự giải đi nhé.


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