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Discussion of Problem
1407
. One-two, One-two
HINT
Posted by
hoan
26 Dec 2010 22:03
prove that for any n, exist number only whit 1 and 2 digit and have n digit that divided by 2^n.
like this:
n=1 -> 2
n=2 -> 12
n=3 -> 112
n=4 -> 2112
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.
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sorry for my poor english.
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