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May 4, 2013 at 12:57 vote accept alezok
May 3, 2013 at 23:28 comment added Misha If it is a homework, then poorly digested, since one can take $f(m)=1$.
May 3, 2013 at 23:10 answer added Ben Barber timeline score: 3
May 3, 2013 at 20:23 comment added Ori Gurel-Gurevich Is this homework? I vote to close.
May 3, 2013 at 16:28 history asked alezok CC BY-SA 3.0