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

dp = [0 for _ in range(n+1)]

for i in range(n+1):
    if i >= 1:
        dp[i] = max(dp[i], dp[i-1])
    if i >= 3:
        dp[i] = max(dp[i], dp[i-3] + a)
    if i >= 5:
        dp[i] = max(dp[i], dp[i-5] + b)
    if i >= 10:
        dp[i] = max(dp[i], dp[i-10] + c)

print(dp[n])