def enumrate_combination(n)
  res = Array.new(n + 1) { Array.new(n + 1, 0i64) }
  (0..n).each do |i|
    res[i][0] = res[i][i] = 1
  end
  (1..n).each do |i|
    (1...i).each do |j|
      res[i][j] = res[i - 1][j - 1] + res[i - 1][j]
    end
  end
  res
end

Comb = enumrate_combination(26)

def enum_len(len, size)
  strings = Array(Array(Char)).new(size)
  (3..len).step(3) do |cnt5|
    (0...len - 1).to_a.each_combination(len - cnt5) do |ind3|
      string = Array.new(len, '5')
      ind3.each { |i| string[i] = '3' }
      strings << string
    end
  end
  strings
end

def func(n)
  sum = 0i64
  (3..100).each do |len|
    tmp = (3..len).step(3).sum do |cnt5|
      Comb[len - 1][cnt5 - 1]
    end
    return {len, n - sum, tmp} if sum + tmp >= n
    sum += tmp
  end
end

n = read_line.to_i64
len, num, val = func(n).not_nil!
puts enum_len(len, val).sort[num - 1].join