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