8 lines
223 B
Ruby
8 lines
223 B
Ruby
require 'prime'
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def almost_primes(k=2)
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return to_enum(:almost_primes, k) unless block_given?
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1.step {|n| yield n if n.prime_division.sum( &:last ) == k }
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end
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(1..5).each{|k| puts almost_primes(k).take(10).join(", ")}
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