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

dp = Array.new(N + 1, 0)

0.upto(N) do |i|
  if i + 3 <= N && dp[i + 3] < dp[i] + A
    dp[i + 3] = dp[i] + A
  end

  if i + 5 <= N && dp[i + 5] < dp[i] + B
    dp[i + 5] = dp[i] + B
  end

  if i + 10 <= N && dp[i + 10] < dp[i] + C
    dp[i + 10] = dp[i] + C
  end
end

puts dp.max