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ayato-p/gist:4022393

Created November 6, 2012 03:36
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gistfile1.rb
#! /usr/bin/ruby
def collatz(n)
print n.to_s+"\n"
if n%2 == 0
collatz(n/2)
elsif n != 1
collatz(n*3+1)
end
end
collatz(ARGV[0].to_i)
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