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Ingy döt Net 2013-04-10 14:58:50 -07:00
parent 2dd7375f96
commit 051504d65b
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14
Task/Arithmetic-Rational/Ruby/arithmetic-rational.rb Normal file
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require 'rational' #Only needed in Ruby < 1.9
for candidate in 2 .. 2**19:
sum = Rational(1, candidate)
for factor in 2 ... candidate**0.5
if candidate % factor == 0
sum += Rational(1, factor) + Rational(1, candidate / factor)
end
end
if sum.denominator == 1
puts "Sum of recipr. factors of %d = %d exactly %s" %
[candidate, sum.to_i, sum == 1 ? "perfect!" : ""]
end
end