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June 2018 Update

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Ingy döt Net 2018-06-22 20:57:24 +00:00
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Task/Almost-prime/Factor/almost-prime.factor Normal file
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USING: formatting fry kernel lists lists.lazy locals
math.combinatorics math.primes.factors math.ranges sequences ;
IN: rosetta-code.almost-prime
: k-almost-prime? ( n k -- ? )
'[ factors _ <combinations> [ product ] map ]
[ [ = ] curry ] bi any? ;
:: first10 ( k -- seq )
10 0 lfrom [ k k-almost-prime? ] lfilter ltake list>array ;
5 [1,b] [ dup first10 "K = %d: %[%3d, %]\n" printf ] each