hybrid3.rb

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

end

def dense(w, d)
	w2 = w - 1
	
	a = (0...w2).to_a
	s = '0' * w2
	(1..(d * w - 1)).map { a.delete_at(rand(a.size)) }.each { |x| s[x, 1] = '1' }
	return ('1' + s)
	
end

def d(s)
        c = s.split('').select { |x| x == '1' }.size
	d = c.to_f / s.length
        return d
        
end

def len01(ns)
	nl = ns.length
	return 0, 0 if (nl < 50)
	l1 = ns.split(/0+/).map { |x| x.length }
	
	l2 = ns.split(/1+/)[1..-1]
	l2 = [''] if (l2.nil?)
	
	l0 = l2.map { |x| x.length }
	return l0, l1
end

def mx01(ns)
	return len01(ns).flatten.max
end

def initr(w, m)

	l = []
	b = 1
	while (w > 0) 
		t = [w, m].min 
		r = (t <= 1) ? 1 : rand(t) + 1
		l << [b] * r
		b ^= 1
		w -= r
	end
	s = l.flatten.join
	return s
end

def initd(w, m)

	d = m.to_f / w
	w2 = w - 1
	
	a = (0...w2).to_a
	s = '0' * w2
	(1..(d * w - 1)).map { a.delete_at(rand(a.size)) }.each { |x| s[x, 1] = '1' }
	return ('1' + s)
end

def initb(w, m)
	r = m.to_f / w
	return '1' + (1...w).map { rand < r ? '0' : '1' }.join
	
end

def initr2(w, m, b)

	l = []
	while (w > 0) 
		t = [w, m].min 
		r = (t <= 1) ? 1 : rand(t) + 1
		l << [b] * r
		b ^= 1
		w -= r
	end
	s = l.flatten.join
	return s
end

def initw(w, m)

	w -= 2
	m = [w, m].min
	i = rand([w - m, 1].max)
	j = w - i - m
	b = rand(2)
	
	ns = initr2(i, rand([i - 1, 1].max) + 1, b ^ 1).reverse + ([b] * m).join + initr2(j, rand([j - 1, 1].max) + 1, b ^ 1)
	
	s = '1' + (ns[0].to_i ^ 1).to_s + ns
	
	return s

end

def mut(ns)

	ns = ns.dup
	i = rand(ns.length - 1) + 1
	ns[i, 1] = (ns[i, 1].to_i ^ 1).to_s
	return ns
	
end

def inner(ns1, ns2)
	a, b = [ns1, ns2].sort_by { |x| x.length }
	d = b.length - a.length
	i = rand(d + 1)
	
	c = b.dup
	c[i, a.length] = a
	
	ns1.replace(b)
	ns2.replace(c)
end

def mix(ns1, ns2)

	ns1 = ns1.dup
	ns2 = ns2.dup
	inner(ns1, ns2)
	return (0...ns1.length).map { |x| [ns1, ns2][rand(2)][x, 1] }.join
	
end

def cut(ns1, ns2)
	ns1 = ns1.dup
	ns2 = ns2.dup
	inner(ns1, ns2)
	i = rand(ns1.length)
	return ns1[0...i] + ns2[i..-1]
end

def ext(ns)

	return (0..rand(3)).map { rand(2) }.join + ns
	
end

def count(ns)
	
	n1 = n = ns.to_i(2)
	l = [n]
	while (n >= n1)
		n = f2(n)
		l << n
	end

	cm = (0...l.size).max_by { |x| l[x] }
	
	return {'z' => cm,
		'c' => l.size
		}
end

def fmt(msg, x)
	
	t = msg.member?(x) ? Time.now.to_i - msg[x] : 0
	m = t / 60
	s = t % 60
	msg[x] = "#{m}m #{s}s"
end

def add(h, ns, seen, msg)

	return if (seen.member?(ns))
	seen[ns] = nil
	
	x = {'ns' => ns}.merge(count(ns))
	return if (!x.member?('z'))
	
	j = ns.length
	h[j] = [] if (!h.member?(j))
	
	a, b = [h[j][0], h[j][-1]]
	h[j] = h.fetch(j, []) + [x]
	
	h[j] = h[j].sort_by { |x| -x['z'] }
	h[j][50..-1] = [] if (h[j].size > 50)

	t = msg['t']
	msg['t0'] = Time.now.to_s
	msg['s'] = seen.size
	msg['hc1'] = h.size
	msg['hc2'] = h.map { |k, v| v.size }.inject(0){ |t, x| t + x }
	if (msg['a1'].nil? || x['z'] > msg['a1']['z']) then
		msg['a1'] = x
		msg2 = msg.dup
		['t', 't1', 't2'].each { |x| fmt(msg2, x) }
		p(msg2)
	end
	msg['t1'], msg['a'] = [Time.now.to_i, h[j][0]['z']] if (a.nil? || h[j][0]['z'] != a['z'])
	if (b.nil? || h[j][-1]['z'] != b['z']) then
		msg['t2'], msg['b'] = [Time.now.to_i, h[j][-1]['z']] 
		seen[ns] = x
	end
end

def top(h1)
	return h1[rand([h1.size / 4, h1.size].max)]
end
	
def opt(w1)


	h = {}

	ops = ['initr0', 'initd0', 'initb0', 'initw0', 'mut1', 'mix2', 'cut2'] # ext1
	
	seen = {}
	msg = {'t' => Time.now.to_i}
	
	loop \
	{
		
		opc = ops[rand(ops.size)]

		c = opc[-1..-1].to_i
		op = opc[0..-2]

		case (c)
			when 0
				ns = send(op, w1, rand(w1))
				add(h, ns, seen, msg)
				
			when 1, 2
			
				redo if (h.empty?)
				ks = h.keys.sort_by { |x| -h[x][0]['z'] }
				h.delete(ks.pop) if (ks.size > 50)
				
				msg['hmn'], msg['hmx'] = [ks.min, ks.max]
				
				ks = ks[0...[ks.size, ks.size / 4].max]
				
				arg = (0...c).map { ks[rand(ks.size)] }
				l = arg.map { |x| top(h[x])['ns'] }
				ns = send(op, *l)
				ns[0, 1] = '1'
				add(h, ns, seen, msg)
				
			end
			break if (msg['t2'] - msg['t'] > 180)
	}

	f = File.open('mixdb.txt', 'w')
	l = seen.select { |k, v| v != nil }.map { |x| x[1] }.sort_by { |x| x['z'] }
	l.each { |x| f.puts(x.inspect) }
	f.close
	$stderr.puts(l.size)
	
end

def seqmx(n)
	n1 = n
	l = [n]
	l2 = []
	while (n >= n1)
		n = f2(n)
		
		l << n
		l2 << mx01(n.to_s(2))
	end
	cm = (0...l.size).max_by { |x| l[x] }
	return l2[0..cm]
end

def sample(l, c)

	r = l.size / c
	l2 = *(0...l.size).select { |x| x % r == 0 }
	l2[c..-1] = []
	return l.values_at(*l2)
	
end

def review(fn)
	l1 = sample(l = File.open(fn).readlines.map { |x| Kernel.eval(x) }, 50)
	
	f2 = File.open('out2.txt', 'w')
	l.each { |x| f2.puts(d(x['ns'])) }
	f2.close

	f = File.open('out.txt', 'w')
	
	j = 0
	l1.each \
	{
		|x|
		ns = x['ns']
		
		l1 = seqmx(ns.to_i(2))		
		
		d = d(ns)
		
		ns = dense(ns.length, d)
		
		l2 = seqmx(ns.to_i(2))		
		
		[l1, l2].each_with_index \
		{
			|l, c|
			
			l.each_with_index { |x, i| f.puts([j + i, x * [1, -1][c], c + 1].join("\t")) }
			f.puts
		}
		j += [l1.size, l2.size].max + 20
	}
	f.close
	exit
	
end

fn = 'mixdb.txt'
review(fn) if (File.exist?(fn))

opt(100)