N = gets.to_i
A = gets.split.map(&:to_i)

m = A.sum % 10
nodes = [m]
min_dist = Array.new(10, Float::INFINITY)
min_dist[m] = 0

A.each do |a|
  m = a % 10

  nodes.each do |n|
    next if min_dist[n] == Float::INFINITY

    nm = (n - m) % 10
    dist = min_dist[n] + 1

    next if min_dist[nm] <= dist
    min_dist[nm] = dist

    nodes << nm
  end
end

if min_dist[0] == Float::INFINITY
  puts 0
else
  puts N - min_dist[0]
end