N = int(input())
a,b,c = map(int,input().split())
dp = [0] * (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])