local mmi, mma = math.min, math.max
local n = io.read("*n")
local a, b, c = io.read("*n", "*n", "*n")
local t = {}
for i = 1, n + 1 do
  t[i] = 0
end
for i = 1, n + 1 do
  if i + 3 <= n + 1 then
    t[i + 3] = mma(t[i + 3], t[i] + a)
  end
  if i + 5 <= n + 1 then
    t[i + 5] = mma(t[i + 5], t[i] + b)
  end
  if i + 10 <= n + 1 then
    t[i + 10] = mma(t[i + 10], t[i] + c)
  end
end
print(t[n + 1])