local prefix = "[Carlos 0.1a] "


-- Funcao printf
local function printf(...) print(string.format(...)) end


-- Funcao combustivel
local function combustivel()
    local restante = turtle.getFuelLevel() -- Combustivel restante
    local suficiente = false

    while true do
        if restante == 0 then
            suficiente = false
            printf("%s Sem combustivel restante, tentando reabastecer.", prefix)
            for i = 1, 16 do
                turtle.select(i)
                if turtle.refuel(0) then
                    local halfStack = math.ceil(turtle.getItemCount(i)/2)
                    turtle.refuel(halfStack)
                    restante = turtle.getFuelLevel()
                    suficiente = true
                    break
                end
            end
        else
            printf("%s Combustivel restante: %s", prefix, restante)
            suficiente = true
            break
        end
    end
    return suficiente

end


-- Funcao minerar
local function minerar(a)
    local possivel = combustivel()


    while possivel do

        local i = 1

        repeat(a)
            turtle.dig()
            turtle.forward()
            possivel = combustivel()
        until i == a

    end

end

local a = io.read("*n")
minerar(a)