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

max_total = 0

max_x = n // 10
for x in range(max_x + 1):
    m = n - 10 * x
    if m < 0:
        continue
    max_y = m // 5
    start_y = max(0, max_y - 4)
    current_max = 0
    for y in range(start_y, max_y + 1):
        remaining = m - 5 * y
        if remaining < 0:
            continue
        k = remaining // 3
        current = b * y + a * k
        if current > current_max:
            current_max = current
    total = c * x + current_max
    if total > max_total:
        max_total = total

print(max_total)