N = int(input())
A, B, C = map(int,input().split())

INF = 1 << 60
dp = [-INF] * (N + 1)
dp[0] = 0
for i in range(N):
	if i + 3 <= N :
		dp[i + 3] = max(dp[i + 3], dp[i] + A)
	if i + 5 <= N :
		dp[i + 5] = max(dp[i + 5], dp[i] + B)
	if i + 10 <= N :
		dp[i + 10] = max(dp[i + 10], dp[i] + C)
print(max(dp))