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

max_d = 0
max_k = n // 10

for k in range(0, max_k + 1):
    remaining = n - 10 * k
    if remaining < 0:
        continue
    max_m = remaining // 5
    best = 0
    start_m = max(0, max_m - 2)
    for m in range(start_m, max_m + 1):
        rem = remaining - 5 * m
        if rem < 0:
            continue
        l = rem // 3
        current = B * m + A * l
        if current > best:
            best = current
    total = C * k + best
    if total > max_d:
        max_d = total

print(max_d)