Monty Hall Problem Simulated, Lua

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-- Change these to see different results!
local doors = 3
local max_tries = 9999
local switch_door = true

-- Don't change --
local answers_correct = 0

local u = 0
local function random(x, y)
    u = u + 1
    if x ~= nil and y ~= nil then
        return math.floor(x +(math.random(math.randomseed(os.time()+u))*999999 %y))
    else
        return math.floor((math.random(math.randomseed(os.time()+u))*1000))
    end
end

for i = 1, max_tries do
    local correct_door = random(1, doors)
    local door_chosen = random(1, doors)
    local door_revealed = random(1, doors)
    
    if door_revealed == door_chosen or door_revealed == correct_door then
        door_revealed = (door_revealed + 1)%doors + 1
    end
    
    if switch_door then
        repeat door_chosen = (door_chosen + 1)%doors +1 until door_revealed ~= door_chosen
    end
    
    if correct_door == door_chosen then
        answers_correct = answers_correct + 1
    end
end

print("Percentage of correct answers: %" .. math.floor( (answers_correct/max_tries)*1000)/10 )
print("\nCorrect answers: " .. answers_correct)
print("Incorrect answers: " .. max_tries - answers_correct)

[ + ] Show input
Absolute running time: 0.26 sec, cpu time: 0.1 sec, memory peak: 5 Mb, absolute service time: 0,45 sec