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

max_total = 0

max_x = n // 10
for x in range(max_x + 1):
    rem = n - 10 * x
    if rem < 0:
        continue
    y_max = rem // 5
    start_y = max(0, y_max - 4)
    for y in range(start_y, y_max + 1):
        if 5 * y > rem:
            continue
        rem_after = rem - 5 * y
        z = rem_after // 3
        total = c * x + b * y + a * z
        if total > max_total:
            max_total = total

print(max_total)