n = int(input())
a,b,c = map(int,input().split())
dp = [0] * (n + 1)
for i in range(n + 1):
    dp[i] = max(
        dp[i -  1]     if i >= 1 else 0,
        dp[i -  3] + a if i >= 3 else 0,
        dp[i -  5] + b if i >= 5 else 0,
        dp[i - 10] + c if i >= 10 else 0,
    )
print(dp[n])