http://www.imo-official.org/problems/IMO2011SL.pdf
q23-q25Q5. *Golden Ratio 16 Definite Integral -2* 2014 -16
(05-31-2014), (06-02-2014), (05-31-2014), (05-31-2014), (06-05-2014)
: 1 (0 1 )
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