n = int(input())
a,b,c = map(int,input().split())
dp = [0] * (n + 1)

for i in range(n + 1):
	if i >= 1:
		dp[i] = max(dp[i], dp[i - 1])
	if i >= 3:
		dp[i] = max(dp[i], dp[i - 3] + a)
	if i >= 5:
		dp[i] = max(dp[i], dp[i - 5] + b)
	if i >= 10:
		dp[i] = max(dp[i], dp[i - 10] + c)

print(dp[n])