Name: 你能解開機器人殺手的謎題嗎？- Dan Finkel (Can you solve the killer robo-ants riddle? - Dan Finkel)
Uploaded: 2021-01-14T08:40:28.000Z
Duration: 4 min 52 s

The good news is that your experimental robo-ants

好消息是，你的實驗性 機器螞蟻非常成功！

情態副詞

給了它們發射致命雷射的能力……

just gave them the ability to shoot deadly lasers

它們會馬上回轉，從原路走回去。

If they bump into each other or hit a dead end,

五分鐘過後，它們就會啟動雷射，

就是把兩個緊急用 真空吸塵器的管嘴插入棲息地中，

用力壓管嘴，就可以讓它 穿過棲息地前面的覆蓋薄膜，

carving a path of destruction as they go.

Your one chance to stop them is to insert

the two emergency vacuum nozzles into the habitat

and suck the ants up before they break free.

The nozzles can press into any one location

一移動就會留下一個洞 讓機器螞蟻逃出來，

in the habitat through a membrane covering

所以關鍵是要選擇正確的插入點。

its front side, and any ants that walk past

棲息地是用一公尺長的 管子做成的。

You can't move the nozzles once they're placed

它們會隨機選擇要 左轉、右轉，或直走。

without leaving a hole that the robo-ants

另一隻機器螞蟻或是碰到死路。

不幸的是，在棲息地中 有數百隻螞蟻，

The habitat is made out of meter-long tubes.

只要有一隻逃脫， 就會造成很大的傷害。

你應該要把這兩個真空 吸塵器的管嘴放在哪裡

才能把所有機器螞蟻都吸起來？

看起來似乎無法在它們 逃出去之前阻止它們。

Unfortunately, there are hundreds of them

但這個情況其實 比看起來的還容易解決。

inside the habitat, and if even one escapes,

想像只有兩隻機器螞蟻， 它們在爬向彼此。

With just less than five minutes remaining,

當它們相撞時，它們 馬上就會轉向反方向。

where should you place the 2 vacuum nozzles

那一連串事件 看起來會是什麼樣子？

Pause the video now if you want to figure it out for yourself.

每當有一對螞蟻相碰時都是如此。

With robo-ants ricocheting all over the habitat,

因為每一隻螞蟻的 個別身分並不重要，

你只需要想出你要把管嘴放在哪裡

But this situation is simpler than it seems.

且每隻螞蟻都會從 棲息地的任何地方

開始不間斷地行走 不到五分鐘的時間。

這樣就比較容易概念化和解題了。

把管嘴放在三或四根管子的交叉口

因為若不放在那裡， 機器螞蟻可能會改變方向，

And what would that sequence of events look

like if they crawled past each other instead?

如果沒有選它，當一隻螞蟻 從這個交叉口向下爬，

This is true every time a pair of robo-ants meet.

Because the identities of individual ants

就會花四分鐘爬回到這個交叉點，

don't matter, you just need to figure out where

接著往另外三個方向之一前進，

any single ant walking without interruption

當你把一隻管嘴放在右上之後，

唯一有可能的選擇就是左下角了。

That's much easier to conceptualize and solve.

想像在棲息地中的任何 其他一處有一隻螞蟻。

Placing the nozzles at intersections where

最糟糕的狀況，這隻螞蟻 會從管嘴旁邊的點開始

three or four tubes meet seems like your best bet

since that's where the robo-ants might otherwise

The top right intersection has to be one of them.

this intersection toward the dead end would

crawl for four minutes to get back to the

intersection, and then go in any of three

在你下次要亂搞機器螞蟻之前，

directions, walking for at least another minute.

你會想要把機器食蟻獸先準備好。

Once you've placed a nozzle in the top right,

如果它還能飛行 和噴火，不是很酷嗎？

right next to the vacuum nozzle, marching away from it.

But in all those worst cases, the ant would march

No other choice of two intersection points

you'll want to have a robo-anteater ready.

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你能解開機器人殺手的謎題嗎？- Dan Finkel (Can you solve the killer robo-ants riddle? - Dan Finkel)

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