N = gets.to_i
A, B, C = gets.chomp.split(" ").map(&:to_i)
dp = Array.new(N + 1, 0)
for i in 0..N - 3
    dp[i + 3] = [dp[i + 3], dp[i] + A].max()
end
for i in 0..N - 5
    dp[i + 5] = [dp[i + 5], dp[i] + B].max()
end
for i in 0..N - 10
    dp[i + 10] = [dp[i + 10], dp[i] + C].max()
end
p dp[N]