n = int(input())
a, b, c = map(int, input().split())
dp = [0] * (n + 15)
for i in range(n):
    dp[i + 3] = max(dp[i + 3], dp[i] + a)
    dp[i + 5] = max(dp[i + 5], dp[i] + b)
    dp[i + 10] = max(dp[i + 10], dp[i] + c)
print(dp[n])