This is problem 10769 of the American Mathematical Monthly. The solution appeared in AMM 108 (2001), 774-775. See also http://tph.tuwien.ac.at/~svozil/publ/blatter.htm
Christian Blatter
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CSI of Charles University
This is problem 10769 of the
This is problem 10769 of the American Mathematical Monthly. The solution appeared in AMM 108 (2001), 774-775. See also http://tph.tuwien.ac.at/~svozil/publ/blatter.htm
Christian Blatter