n = int(input())
a, b, c = map(int, input().split())

max_m = n
dp = [0] * (max_m + 1)

for m in range(1, max_m + 1):
    option1 = dp[m - 5] + b if m >= 5 else 0
    option2 = dp[m - 3] + a if m >= 3 else 0
    dp[m] = max(option1, option2)

max_discount = 0
max_z = n // 10

for z in range(max_z + 1):
    remaining = n - 10 * z
    if remaining < 0:
        continue
    current_total = z * c + dp[remaining]
    if current_total > max_discount:
        max_discount = current_total

print(max_discount)