n = int(input())
a, b, c = map(int, input().split())
m = max(a*10, b*6, c*3)
ans = n // 30 * m
n %= 30
tmp = 0
for i in range(n//3+1):
  for j in range((n-i*3)//5+1):
    k = (n - i * 3 - j * 5) // 10
    tmp = max(tmp, i*a+j*b+k*c)
ans += tmp
print(ans)