db5.rb

def f2(n)
	return n.odd? ? (n * 3 + 1) / 2 : n / 2

end

def seq(n)
	l = [n]
	
	while (n != 1)
		n = f2(n)
		
		l << n
		
	end
	return l
end

def count(x)
	
	n = x['n']
	l = seq(n)
	
        cg = l.index { |x| x < l[0] }
        cg = l.size - 1 if (cg.nil?)
        cm = (0..cg).max_by { |x| l[x] }

        c = l.size
	
	return {'n' => n,
		'cm' => cm,
		'cg' => cg,
		'c' => c,
		'k' => x['k']
		}
end
	

l = File.open('db.txt').readlines.map { |x| Kernel.eval(x) }

f = File.open('db5.txt', 'w')
l.each_with_index \
{ 
	|x, i|
	f.puts(count(x).inspect)
	$stderr.puts(i + 1) if ((i + 1) % 100 == 0)
}
f.close