# Be safe to use `//` for integer division

*Codeforces Rd #368 (Div. 2) Problem C*

In this problem, we have to deal with large integer to get the answer. The key to preserve precision is to use `//`

operator for integer division because `/`

will convert your *int* to *float*.

According to Python documentation, *int* has unlimited precision while *float* has only 53 bit precision (~15 digits) for integer part.

Notes: For python3. *int* behaves the same way as *long* in python 2.

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