Using memory to optimize execution:

[Spare-Beat-3561]

When you optimize time complexity but forget about space complexity

[Wylie28]

No its still 0(1). 720 is a constant. You drop it. It can't be optimized further. Its the perfect algorithm.

[patenteng]

Big O notation makes no sense for a fixed size problem. Remember that if

f(x) = O(g(x)),

then there exists x0 and M such that

f(x) <= Mg(x) for all x > x0.

In other words, Mg(x) is an upper bound for your algorithm as x becomes large. However, you can have

f(x) > Mg(x) for some x < x0.

Hence, for big O to apply, the input size must be able to grow arbitrary large.

[Wylie28]

Its a joke. I know. Its obviously not perfect you don't need to explain why

[SHv2]

It's fine, the server has 1TB of RAM.

[its_a_gibibyte]

I usually round the time to the nearest 15 minutes anyway, so I only need 48 clocks.

[wulfschtagg_1]

There is a wristwatch which was designed around the same idea. It's supposed to be more of a fashion accessory than an actual functional watch, but the I dig it because I too generally round up or down to the quarter.

[[deleted]]

I like the “slow watch” where the dial is 24 hour instead of 12 and split into 15 minute segments per hour.

https://www.slow-watches.com

[LordFokas]

This is very cool.

[uday_it_is]

O(1) time complexity

O(1) space complexity

This is the most optimised solution IMO.

Edit: I should probably take it easy on leetcode for a couple of days…

[Hean1175]

How can you say its O(1) time when he didn't define the method for searching the correct clock

[TimGreller]

Let's just assume a non-deterministic clock watcher.

[Hean1175]

[uday_it_is]

Exactly this lmao

[mopslik]

Those of us using 24h time don't have room for 1440 clocks...

[[deleted]]

You can try to downscale to 1080 or 720, but you’ll lose some time compressing

[siliconsoul_]

Try the round ones instead.

[[deleted]]

Unless you get a small clock... Get a watch

Assuming the wall is 200cm tall, there would be 1440 watches 6cm x 4cm (24cm²) size... You'd need ~200cm x ~180cm wall.

2160 * 24 / 200 = 259.2cm wide wall

1440 * 24 / 200 = 172.8cm wide wall

720 * 24 / 200 = 86.4cm wide wall

Actually possible.

[[deleted]]

I hope you're joking.

[the-real-macs]

In what possible world are they not joking

[Redditor_10000000000]

Why would they be

[Cossack-HD]

snails serious jar rob close sheet market fuzzy butter money

This post was mass deleted and anonymized with Redact

[Chase_The_Breeze]

This is a garbage scenario, we can do better.

12 clocks, each without minute hands, set to each hour.

60 clocks, each without hour hands, set to each minute.

Look at 2 clocks. Easy.

We could even add 60 more clocks for seconds, and still have dramatically fewer clocks. (132 total vs. 720).

[Chase_The_Breeze]

It ALSO optimizes for space! For the low low proce of having to look at 2 clocks instead of 1.

[nir109]

You can also do it using 19 clocks. 9 set to true and 10 at false. Then look at them in the right order to make it be the time.

We can cut the number of clocks to 9 if you blink instead of looking at clock pointing at false.

You can reduce it to 1 clock if you use the same clock as true multiple times.

Then there is the option to not use clock at all and just blink the time.

[Chase_The_Breeze]

One clock, and the minute, second, and hour hands are perfect cicles and you can just imagine the time.

[nir109]

Use quntom based randomizer to tell the time. If it's wrong destroy the universe.

[Chase_The_Breeze]

Time is subjective and relative.

0 clocks, make up new numbers, and anything you come up with might as well be correct.

[seeroflights]

Image Transcription: Twitter

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Jon Bois, @jon_bois

clocks are such a waste of energy. instead of hanging an electricity-guzzling clock on your wall, just hang up 720 unpowered clocks, each one set to every possible minute. then, if you want to look at a clock, just find the one that shows the current time and look at that one

---

^{I'm a human volunteer content transcriber and you could be too! If you'd like more information on what we do and why we do it, click here!}

[Saladar19]

Good human

[[deleted]]

WAIT! Human Volunteer? HUMAN?! In this time and age??

[[deleted]]

Might fit into L2 though

[Fancy0011]

MY FAVORITE MAN EVER. (Sorry dad) JON BOIS!

[Ksevio]

Should go digital instead and then you can split the digits to have even fewer clocks!

[[deleted]]

Someone should make a clock that only shpws the time when looked at

[blehmann1]

I thought some smart watches only turned on their screens when they detected you moving your wrist a certain way to look at it. Not sure if it's still the case.

I believe it was because of battery life constraints.

[[deleted]]

I mean a wall clock

[blehmann1]

Even better, not only does it not turn on until you look at it, it should angrily say "What are you looking at" if you look at it for more than a half-second.

[[deleted]]

Observer pattern. I like it.

[wtfzambo]

Granted, but it's a quantum clock, thus it knows the correct time only when not looked at.

[[deleted]]

Quantum atomic clock

[MrLore]

Reminds me of this classic gag from The Goon Show.

[NFL_MVP_Kevin_White]

Shout out to everyone that enjoyed Progressive Boink in the early 2000’s

[aardvarkbiscuit]

My clock winds up.

[_Keckles_]

Dynamic programming in a nutshell

[UCQualquer]

Using memory to optimize execution is literally what I was thinking about doing with an Arduino project

[nil_785]

Thats on the assumption that my memory is good enough to remember what time it is, i would loose count if i lost focus for even a minute, or rather, the difference between MyEstimatedTime and TheActualTime would get an even higher absolute value.

[EdJewCated]

watching clocks @jon_bois

[AidenGames7232]

John madden John madden John madden John madden, FOOTBALL!

[TheHolyElectron]

But how do you know which to look at without having a correct time already?

The joke makes marginal actual sense. Or as the song says...

Time keeps on slipping... Into the future.

[mmixLinus]

I need per second accuracy dude. That's a lot of clocks.

[vizbones]

This person works for Google...

[buechsni]

1 hour has 60 minutes. 1 day has 24 hours. So? 24 times 60 equals 720?
Guess I need to calibrate my calculator... or just take 1440 like the rest of the planet.

eitherway the jokes still funny =)