three7.rb

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

end

def count(ns)
	
	
	n1 = n = ns.to_i(2)
	l1 = [n]
		
	while (n >= n1 && n != 1)
		n = f2(n)
		l1 << n
	end

	nl = ns.length
	cm = (0...l1.size).max_by { |x| l1[x] }
	
	return {'ns' => ns, 
		'nl' => nl,
		'cm' => cm,
		'cmnl' => cm - nl}
		
end

def div3(n)
	c = 0
	while (n % 3 == 0)
		n /= 3
		c += 1 
	end
	return c
end

def d3(l)
	
	a = {}
	l.each { |x| x1 = x % 3; a[x1] = a.fetch(x1, 0) + 1 }
	p(a)
	p(a[2].to_f / a[1])
end


l = File.open('tmp/mix30d/mixdb_cm.txt').readlines.map { |x| Kernel.eval(x) }
l.sort_by! { |x| x['cm'] }
x = l[-12]
n = n1 = x['n']

l = []
while (n >= n1)
	n = f2(n)
	l << n
end

cm = (0...l.size).max_by { |x| l[x] }

p([cm, l.size])

d3(l[0..cm])
d3(l[cm..-1])