Created
February 9, 2018 19:53
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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).to_i(2) | |
end | |
def stat(l) | |
l = [0] if (l.empty?) | |
t = t2 = 0 | |
l.each \ | |
{ | |
|x| | |
t += x | |
t2 += x ** 2 | |
} | |
c = l.size | |
a = t.to_f / c | |
z = t2.to_f / c - a ** 2 | |
sd = Math.sqrt(z < 0 ? 0 : z) | |
return a, sd, l.max.to_f, l.min.to_f | |
end | |
def stat2(l, t, n) | |
return Hash[[["a#{n}", "sd#{n}", "mx#{n}"], stat(l)[0..2].map { |x| x / t }].transpose] | |
end | |
def d(s) | |
c = s.split('').select { |x| x == '1' }.size | |
d = c.to_f / s.length | |
return d | |
end | |
def data(n) | |
ns = n.to_s(2) | |
nl = ns.length | |
m = nl / 2 | |
nsh = ns[0..m] | |
nsl = ns[m..-1] | |
asdm1 = stat2(ns.split(/0+/).map { |x| x.length }, nl, 1) | |
l1 = ns.split(/1+/) | |
l1.shift | |
asdm0 = stat2(l1.map { |x| x.length }, nl, 0) | |
return {'n' => n, 'ns' => ns, 'nl' => nl, 'd' => d(ns), 'dh' => d(nsh), 'dl' => d(nsl)}.merge(asdm1).merge(asdm0) | |
end | |
def sum(l) | |
t = 0.0 | |
l.each { |x| t += x } | |
return t | |
end | |
def count(n) | |
n1 = n | |
l = [n] | |
begin | |
n = f2(n) | |
l << n | |
end while n > n1 | |
m = (0...l.size).max_by { |x| l[x] } | |
r = l[m].to_s(2).length - n1.to_s(2).length | |
return {'c' => l.size, 'n' => n1, 'l' => l, 'm' => m, 'r' => r} | |
end | |
def load(s) | |
raise if (s.nil?) | |
d = "out/#{s}" | |
l = Dir.glob("#{d}/*").select { |x| x =~ /out\d+.txt$/} | |
n = l.size | |
i = n - 1 | |
a = Kernel.eval(File.open("#{d}/out#{i}.txt").readlines[0]) | |
l = a['lb'].map { |x| x.size } | |
raise if (sum(l) != 0) | |
return a | |
end | |
def dot(x, z) | |
t = z['c'] | |
(z.keys - ['c']).each { |v| t += z[v] * x[v] } | |
return t | |
end | |
def detect(n, a) | |
$seen = {} if ($seen.nil?) | |
if $seen.member?(n) then | |
$seen['h'] = $seen.fetch('h', 0) + 1 | |
return $seen[n] | |
end | |
x1 = data(n) | |
i = 0 | |
w = 1.0 | |
x1['wr'] = 1.0 | |
loop \ | |
{ | |
x2 = {} | |
(a['v'] + ['wr']).each \ | |
{ | |
|vy| | |
x2[vy] = dot(x1, a[vy].select { |k, x| (a['v'] + ['c']).member?(k) }) | |
} | |
x1 = x2 | |
w *= x1['wr'] | |
i += 1 | |
break if (w < 1.0 || i == 500) | |
} | |
$seen[n] = i | |
return i | |
end | |
def out(fn, l) | |
f = File.open(fn, 'w') | |
f.puts(l[0].keys.join("\t")) | |
l.each { |x| f.puts(x.values.join("\t")) } | |
f.close | |
f = File.open('gnuplot.cmd', 'w') | |
f.print('plot ') | |
['w', 'd'].each \ | |
{ | |
|x| | |
f.puts("'#{fn}' using (column('i')):(column('#{x}')) title '#{x}' with line,\\") | |
} | |
f.puts | |
f.close | |
end | |
def dist(c) | |
l = [] | |
seen = {} | |
3.times { | |
l += (0...c).map \ | |
{ | |
|i| | |
n = dense(100, i.to_f / (c - 1)) | |
next if (seen.member?(n)) | |
seen[n] = nil | |
count(n) | |
}.compact | |
} | |
l.sort_by! { |x| x['m'] } | |
l.reverse! | |
return l | |
end | |
def test(a) | |
l2 = [] | |
l = dist(100) | |
i = 0 | |
l.select { |x| x['m'] >= 25}.each \ | |
{ | |
|y| | |
y['l'][0..y['m']].each \ | |
{ | |
|x| | |
l2 << {'i' => i, 'w' => x.to_s(2).length, 'd' => detect(x, a)} | |
i += 1 | |
} | |
l2 << {} | |
i += 20 | |
} | |
out('out.txt', l2) | |
$stderr.puts("hits #{$seen['h']}") if ($seen.member?('h')) | |
end | |
a = load(ARGV[0]) | |
test(a) | |
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