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

discount = [0 for _ in range(N+1)]
for i in range(1,N+1):
    if i>=3:
        discount[i] = max(discount[i], discount[i-3] + A)
    if i>=5:
        discount[i] = max(discount[i], discount[i-5] + B)
    if i>=10:
        discount[i] = max(discount[i], discount[i-10] + C)
print(max(discount))