N = int(input())
A, B, C = map(int, input().split())
dp = [0] * (N + 1)
for i in range(N + 1):
    if i - 10 >= 0:
        dp[i] = max(dp[i - 1], dp[i - 3] + A, dp[i - 5] + B, dp[i - 10] + C)
    elif i - 5 >= 0:
        dp[i] = max(dp[i - 1], dp[i - 3] + A, dp[i - 5] + B)
    elif i - 3 >= 0:
        dp[i] = max(dp[i - 1], dp[i - 3] + A)
    else:
        dp[i] = dp[i - 1]
print(dp[N])