N = int(input())
A = [3, 5, 10]
B = list(map(int, input().split()))

dp = [0] * (N + 1)
for i in range(1, N + 1):
    for j in range(3):
        if i >= A[j]:
            dp[i] = max(dp[i], dp[i - A[j]] + B[j])

print(max(dp))