n = int(input())
a,b,c = map(int,input().split())
dp = [0] * (n + 10)

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

print(dp[n])