Problem 473. old wine in a new bottle?

AMITAVA BISWAS

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You have been given an apparently brand new unary function XXX,
that maps some ordinary scalars to scalars,
please guess if this XXX is 'new wine' or 'old wine',
that is functionally equivalent to an already built-in function,
such as sin cos sqrt log10 etc.,
for positive inputs between 0.2 to 0.8.

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Last Solution submitted on May 25, 2026

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2 Comments

@bmtran (Bryant Tran) on 9 Mar 2012

test case 2 is incorrect. the given function will only return positive values, which means it is not equivalent to sin (and therefore new wine)

AMITAVA BISWAS on 9 Mar 2012

adding 'for positive inputs between 0.2 to 0.8'

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