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National and Regional Contests
PEN Problems
PEN A Problems
83
83
Part of
PEN A Problems
Problems
(1)
A 83
Source:
5/25/2007
Find all
n
∈
N
n \in \mathbb{N}
n
∈
N
such that
⌊
n
⌋
\lfloor \sqrt{n}\rfloor
⌊
n
⌋
divides
n
n
n
.
floor function
Divisibility Theory