The World Machine | Think Like A Coder, Ep 10

譯者: Clement Fu 審譯者: Helen Chang

[TED-Ed 原創系列]

《時代女神 x 程式邏輯革命》

[地點：奴芯堡]

[第十集：「鳥」‧「結」]

As Ethic falls, she remembers.

那偉大的黑手拋下了彥霖，記憶亦歸位

She remembers the world before they unearthed the crystal.

她記起那台天地間的橐籥問世前的混沌

又記起在橐籥的「水晶宮」埋首主控台

She remembers the glee she felt when she built her first robot.

解開玄機建造首個機器人那無名的快樂

But mostly she remembers the friends she’s made

但最歷歷在目的

還是她最後一段日子相遇的同路手足：

these last few days:

courageous Adila and her resistance movement.

女中豪傑艾德拉

不畏強權，率領光復時代的革命

Octavia’s sacrifice to keep the guards distracted.

捨己救人的何莉菲

挺身而出，分散鐵甲桀犬的注意

Lemma and her idealistic drive to cure everyone.

情操高尚的連儂雅

追隨理想，齊上齊落救贖所有人

And Hedge.

還有凌杰──他的好

Her creation, her responsibility, her failure… her betrayer.

她的用心良苦，她的責無旁貸

到最後因她失誤，令他無奈，被它出賣

Hedge, who convinced her to collect the three nodes

三枚瑰寶被借屍還魂的「靈結」收編

that she never actually needed.

也淪為惡靈超然其上、弄於股掌的玩笑

For Ethic remembers how to operate the World Machine.

彥霖重拾記憶足以重新召喚「創世機」

If only she could get a second chance at it.

倘若她再有一次機會

Adila has been in radio contact with Octavia,

艾德拉用無線電聯絡上何莉菲

whom the robots captured and imprisoned in the same jail that held Ethic.

何莉菲自從被鐵甲桀犬逮捕後

就囚在彥霖最初沈睡中甦醒的監獄囚房

Ethic explains that Hedge has manipulated them all,

彥霖解釋，惡靈借屍還魂的「靈結」

借鐵甲桀犬擺佈，騙遍一編新世界

and will now try to break down the Bradbarrier

現在更下一城打算拆下「八達圍」

and cover the entire world in a giant maze,

鋪天蓋地將整個世界盡化成巨型迷宮

unless they can stop him.

除非合眾人之力，能出手制止它

But she has a plan:

彥霖心生一計：

Ethic herself will go to the crystal at the center of the maze

她要直搗藏在迷宮中央的「水晶宮」

and use its powers to stop Hedge.

利用「創世機」的力量制止「靈結」

Meanwhile, Adila and Lemma will do whatever they can to slow Hedge down.

同時，艾德拉和連儂雅唯有聲東擊西

竭盡所能拖延時間

As Ethic weaves her way towards the innermost maze,

彥霖出發直闖迷宮中心

her radio picks up a transmission.

在路上收到無線電訊號

Octavia has freed hundreds of members of the resistance from stasis.

何莉菲喚醒在囚數百名沈睡的光復手足

Together, they’ve staged a jailbreak and overwhelmed the guards.

人多勢眾，眾人合力擊退守衛成功越獄

The resistance has access to the World Machine,

一眾光復手足直達並找到「創世機」

but they don’t know how to use it; they’ll need Ethic for that.

但運用之法不得要領，仍待彥霖出馬

All they have at their disposal are nearly limitless spools of wire.

信手拈來的只有源源不絕的一捲捲紅線

The strands are durable, but prisoners can break them deliberately

紅線堅韌無比

但有心的話，需要時手足仍能剪斷紅線

if they need to.

Ethic reaches the entrance to the inner most maze… and it’s sealed from within.

彥霖抵達迷宮核心外圍的入口

那扇大門從內反鎖

She remembers a few things from when she flew over the maze days earlier.

彥霖記起凌杰最初帶挈她飛越迷宮時

看到的一二事

It centers on the crystal.

迷宮圍繞中央的水晶向外擴建

There are many dead ends, but no paths that loop back on themselves.

胡同中，死路多不勝數

但無一條是重回原地的循環路

Ethic has one opportunity to radio the members of the resistance

彥霖只有一次機會

用無線電一開始向光復手足囑咐幾句話

a simple set of instructions

交代一套簡單的指示

before they plunge into the labyrinth in search of the exit.

然後手足就會各自爬山，努力找尋出路

What directions can she give them so they can quickly navigate the maze,

彥霖可給手足甚麼指示

讓他們迅速找到迷宮的出路，打開大門

open the door, and guide Ethic straight back to the crystal?

並引領彥霖重回最初的核心水晶？

Pause now to figure it out for yourself.

[若要自己動腦筋，就按一下暫停]

Hint in 3

[訣竅倒數 3]

Hint in 2

[訣竅倒數 2]

Hint in 1

Here’s a hint:

[訣竅倒數 1]

訣竅：

One of the challenges here is to find a way to indicate where dead ends are,

其中一個難題

就是要找一個方法標示哪兒是死路一條

so that the resistance members don’t keep going down them.

如此光復手足就不會重蹈覆轍

Try simplifying the maze to something like this.

先試試把迷宮如此簡化

Let’s say you’ve just hit this dead end, then came back to this intersection.

假設您剛遇上這條死路，折返這個路口

What could you do to show the next person who gets here

要怎麼做去告訴之後素未謀面的手足

that they don’t need to explore that path?

此路不通，要另尋蹊徑？

Pause now to figure it out yourself.

[若要自己動腦筋，就按一下暫停]

Solution in 3

[揭曉倒數 3]

Solution in 2

[揭曉倒數 2]

Solution in 1

[揭曉倒數 1]

Most programming puzzles involve giving instructions to a single actor

大部分程式設計謎題

是編寫指示予單一個體執行

so that they can accomplish a goal.

從而達成單一目標

Instead, here we have a swarm of individuals,

現在，在囚的手足多不勝數

each of whom can follow basic instructions.

每一名手足都能跟隨一些基本指示

That’s unusual in programming, but not unheard of;

在程式設計中

這非比尋常，但亦非前所未聞

researchers are currently experimenting with swarms of small robots

目前的研究正試驗利用一群小機器人

to do things like conduct search and rescue missions.

來進行例如搜救任務的工作

The prisoners aren’t robots, but for Ethic’s purposes they’ll act like them.

在囚手足並非機器人

但說到為彥霖出一分力，道理如出一轍

And by working together they can achieve their goal much more efficiently.

合眾人之力，就能更有效率達成目標

Because you have a lot of prisoners, you’ll want them to cover a lot of ground.

既然在囚手足人數眾多

試探的路覆蓋越深入、廣大，就越好

This matches up well to a maze-mapping technique called a depth-first search.

這其實對應了一種迷宮比對技巧 (maze-mapping technique)

名為「深度優先搜尋」 (depth-first search)

It’s called that because it involves going as deeply down a path as possible

顧名思義，是盡可能將一條路探尋到底

before going back.

然後才折返

In other words, if you had a maze like this,

換言之，譬如說迷宮是這樣子

you’d want to explore all the way down one of these branches

就窮究其中一條分岔路，直到盡頭

before returning to this intersection and trying another.

然後才沿路折返此路口，再試另一條

Everyone needs a clear set of instructions for what they should do.

每人都需要一套說清楚要怎麼做的指示

Like — first, tie down the loose end of your wire by the crystal,

比如說，首先把紅線一端繫在核心水晶

so it leads back there.

之後的路再顛簸，最終還是重返這初心

If you find the door, open it and hand your spool to Ethic.

若找到那扇門，打開門把線軸交給彥霖

If you’re in a passageway, keep going until you hit a dead end

若只是轉角處，人在路途上就一路前行

直到盡頭或是路口

or an intersection.

But what happens at either of those places?

那之後又怎樣了？

If someone encounters a dead end,

如果前無去路，到了盡頭

they should backtrack to the last intersection.

就沿路折返最後一個路口

But they also need to mark it, so no one wastes time and goes back there.

這條死路還需要標示

以免後來的手足白走一趟冤枉路

The best tool for that is the wire—

最好的工具，就是紅線本身

one option is to break both sections that lead down the dead end path,

一個方法是把來回死路重疊的紅線剪斷

and tie the spool to the wire that leads back to the crystal.

再把線軸一端跟重返初心的懸線打結

The broken wires tell everyone else who gets to this intersection

剪斷的紅線無異跟後來此路口的手足說

“Don’t go this way.”

逾越紅線以後，前方死路一條

They’ll also guarantee the final path will lead straight to the crystal,

這樣也確保終極的一串紅線會直達水晶

rather than visiting dead ends.

重回初心，而非走上絕路

Ok, so let’s say someone’s at an intersection.

好，那麼一個人走到交叉口

Now which way should they go?

又該走哪一條岔路呢？

The first priority is to have everyone cover fresh ground

首選是每一個人都探尋新的路

to minimize doubling up.

盡量避免重複走別人的路

So if there’s no wire down a direction, go that way.

故此，哪裡沒有紅線，就是要走的方向

If there are multiple choices, choose one at random.

若多於一條沒紅線的路，就任君選擇

What if they’re in a sub-section like this, with 3 marked dead ends?

假如來到這三岔路口，三條路都走盡了

The only thing to do is to go back where they came from.

唯一好做的事就是折返原來的地方

We now know that this whole section is one big dead end,

我們就知道前方是扭結成一段的大死路

so they should break and retie the wire when they get to the next intersection.

把沒結果的大死結一刀兩斷就好

然後到下一個路口去，再結下紅線

But let’s say they get there, and find two options where someone’s exploring,

又假如到了下一個路口，有兩條路選

兩條路上仍有人在修行，未有結果

but no one’s hit a dead end yet.

They may as well choose at random and go help explore that path further,

大可隨心選一條，助同路手足繼續探索

in case it’s the right direction for the exit.

說不好哪一條是修成正果的出路

This isn’t the only way to solve this challenge, but in any correct method,

解這謎的方法不只一個

但憑任何正確方法

someone will eventually find the way out.

一個人歸究會找到出路

The moment of truth will be when Ethic takes their wire and follows it back,

一俟彥霖跟隨眾人的紅線一路重回初心

inward towards her goal.

一切真相就在此刻解開

The great thing about this method is that Ethic’s path is straight and true.

這個方法的好，是彥霖走的路正直真確

The maze doesn’t have loops, so there's only one path from door to crystal.

迷宮沒有繞圈圈

那扇門、那初心，不過是走過不二正路

And because everyone has been breaking and retying their wires,

又因每個人都嘗盡紅線、走盡自己的路

Ethic won’t go down any dead-end paths.

彥霖才能安心上路，回歸初心不再流離

水晶浴火重生，搖身一變厲害「鳥」

Face to face with her creation, Ethic has a choice:

彥霖終跟她眼前擺脫黑手的「結」對望

she can destroy Hedge, or set things right.

彥霖可狠狠地了結借屍還魂的「靈結」

又或者，彥霖可救贖自己的凌杰

All of this destruction was her fault, not Hedge’s;

千錯萬錯，這個結何嘗不是因她而起？

it was her oversight that instructed him to build an infinitely large maze.

唯有度量才有容乃大，不窮容量的偉大

她一個不留神，遺下無心的未知數

指示他在地上建造無從完結的巨型迷宮

His decisions were misguided, but everything he did,

凌杰用盡邏輯、心機，推理最難解的謎

無非至死不渝在地上奉行她的旨意麼？

he did to follow his programming.

Ethic accesses his core and fixes her error with a single number:

彥霖進入他的核心，在迷宮終結時一欄

寫下了心中那還沒說出口的數字

the size the maze was supposed to reach.

凌杰，你的路走盡了，你自由了

Ethic has prevented catastrophe

彥霖力挽了一場災難

and regained possession of the World Machine.

重奪了「創世機」掌控大權

Her work with Adila, Octavia, and Lemma has already started to help people

艾德拉、何莉菲、連儂雅和她眾人之力

努力拯救世人、修補世界傷痕已起變化

and heal the world’s turmoil, but there’s much work to be done.

哪怕仍長路漫漫

「奴芯堡」工廠已扭轉生產「忘我水」

With the forgetting food out of their systems,

讓人們忘卻花亂雙眼、醉生夢死的自我

the people will become themselves again.

重新做回自己本來面目的一個人

They’ll regain their will to create and progress.

再次重拾自由意志，可以創造、進步

They’ll be free to break down the walls they’ve built between each other.

可以自由拆下人與人之間高築的圍牆

未來偃烽槍、再無被人拋下的「煙林」

And they may come to approach their future with a little less greed

「奴芯」與私心不再，人心與仁心長存

and a little more... Ethic

也許，我們都是彥霖