local function fib(n)
  if n < 2 then return n end
  return fib(n - 1) + fib(n - 2)
end

local function loops()
  local s = 0
  for i = 1, 9000000 do
    s = s + (i % 7) * 3 - (i % 5)
  end
  return s
end

local function floats()
  local s = 0.0
  for i = 1, 3000000 do
    s = s + 1.0 / (i * 0.5 + 1.0)
  end
  return s
end

local function tables()
  local t = {}
  for i = 1, 600000 do t[i] = i * 2 end
  local s = 0
  for i = 1, 600000 do s = s + t[i] end
  for i = 1, 100 do
    for j = 1, 100 do s = s + (t[i] or 0) end
  end
  return s
end

local function strings()
  local parts = {}
  for i = 1, 150000 do parts[i] = "item" .. i .. "=" .. (i * 3) end
  local s = 0
  for i = 1, #parts do s = s + #parts[i] end
  return s
end

local total = 0
total = total + fib(27)
total = total + loops()
total = total + math.floor(floats())
total = total + tables()
total = total + strings()
print(string.format("lua-bench checksum=%d", total))