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

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

print(v)