Fraktaali

n = ARGF.readline.to_i - 1

popcount = ['#']
n.times do |i|
  (2**i).times do |j|
    popcount.push popcount[j] == '#' ? '.' : '#'
  end
end

(2**n).times do |i|
  tmp = ""
  (2**n).times do |j|
    tmp << popcount[i & j]
  end
  puts tmp
end

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED

Test 4

Group: 4

Verdict: ACCEPTED

Test 5

Group: 5

Verdict: ACCEPTED

Test 6

Group: 6

Verdict: ACCEPTED

Test 7

Group: 7

Verdict: ACCEPTED

Test 8

Group: 8

Verdict: ACCEPTED

Test 9

Group: 9

Verdict: ACCEPTED

Test 10

Group: 10

Verdict: ACCEPTED