Generated by Codex with GPT 5.6 Sol High

Quick facts

• Difficulty: MEDIUM
• Problem: Build an Array With Stack Operations
• Topics: Array, Stack, Simulation

The problem in one sentence

Starting with an empty stack, consume the stream 1, 2, ..., n in order and emit Push and Pop operations so the stack becomes exactly the strictly increasing array target—then stop immediately.

Generated by Codex with GPT 5.6 Sol High

The hard part of building a frontier-model cluster is not collecting a large number of GPUs. It is making hundreds of thousands of accelerators, spread across buildings and separated by as much as 100 kilometers, behave like one dependable machine. At that scale, network topology, firmware rollout, spare capacity, cooling, power delivery, and even the failure rate of individual signaling links all become part of model-training performance.

Generated by Codex with GPT 5.6 Sol High

Techmeme surfaced Google Quantum AI’s October 15 report, “Bringing the magic: Google breaks open a bottleneck in quantum computing,” after the underlying experiment was published in Science. The result does not mean that Google’s Willow processor can now run useful fault-tolerant applications. It does show, on real superconducting hardware, that a promising way to manufacture one of universal quantum computing’s most expensive ingredients can work.

Generated by Codex with GPT 5.6 Sol High

Flames, explosions reported amid large Ukrainian drone attack on St. Petersburg (r/worldnews)

• WaffleHouseGladiator: War looks a lot different when it’s on your doorstep rather than on your TV.
• Horse_and_Fart: Trump will be shutting down StarShield this time.
• love_is_an_action: We now go live on the scene with senior foreign correspondent, Nelson Muntz, for his take on this shocking development.
  
  Nelson?

Canada’s prime minister says ‘serious incident’ caused a major fire at a military base in Alberta (r/worldnews)

• Margotkitty: Horrifying. I’m in SK and they were sending out a prepare for Code Orange (mass casualty) to our WhatsApp. They stood it down, but our STARS helicopter is there.
  
  This is so awful. All 3 Edmonton hospitals are Code Orange and there are going to be badly burned patients if what is being reported is accurate.
  
  This is awful, tragic, horrible news and the very last thing Alberta, or Canada, needed to happen when things are already so stressful.
  
  My condolences and prayers are being sent to everyone involved - including all the first responders. God speed everyone. ❤️
• YouProfessional3196: Significant casualties including fatalities being reported.
• Mainly_Miserable: Wow. It’s aggravating how little information there is in that story. I hope everyone is alright.

Americans’ debt problems are flashing a warning not seen since the Great Recession (r/Economics)

• jayfeather31: Considering that it feels like I’ve been gaslit on the economy for years, and have been waiting for the other shoe to finally drop when reality finally catches up to the investors, my only reaction here is a, “Yeah no shit.”
• bselite: Yeah, I know a lot of people personally who have so much credit card debt it’s essentially inevitable that at some point they won’t be able to pay the minimum on all their cards. Credit card companies gave out a lot of large limits on cards from around 2018-2023 and now people have maxed those out with lifestyle creep and inflation.
  
  I think instead of a housing crisis we are going to have a personal debt crisis that in combination with inflation wrecks large portions of the economy.
• dually: The only reality that matters right now is the fact that AI companies are pumping \$50billion per month in new data center construction in to the economy. The fact that inflation has only been around 3% is amazing.

Trump puts new Russia sanctions passed by Congress on hold, saying waiver is in US national interest (r/politics)

• ITrageGuy: How can a president legally put a law passed by Congress “on hold.”
• Randall_McRandall: The Epstein files must be unbelievably horrific.
• wolf_tree: A waiver is in this traitor’s best interest.

🇪🇺 EU Defence Commissioner Kubilius: Pax Americana is over. Our new security architecture will include Ukraine. These are times of profound transformation. A rising China and India will push the US to third place. And for Americans this may prove psychologically challenging (r/geopolitics)

• Cephei101: If there’s actual European will and resources behind this instead of the usual big, cheap language we often see, it’s hard to disagree with the premise.
  
  The US really does seem to be demand destructing itself in fast forward, dismantling its influence and relevancy.
• OP_Skis_In_Jeans: Definitively stating that India will surpass the US is quite a bold prediction. Not saying it’s impossible, but even China surpassing the US is far from guaranteed: people were saying it would have happened by now a decade ago and it still isn’t that close to becoming reality.
• Firecracker048: Hes not entirely wrong that they will be moving their defense over into primarily europe, but prediciting India will pass the US is completely wild. China is, even at this stage, a maybe, let alone india

Generated by Codex with GPT 5.6 Sol High

My interviewer literally said “this is the best answer I’ve heard all day.” I still didn’t get the job. (Blind)

• \$oney (Airbnb): He probably only hears like 1 answer per day
• hFsG65 (Snap): The stripper said she liked me a lot
• secas (Pinterest): Both can be true .

The Netflix Layoffs feel random – is that normal??? (Blind)

• airbnbGo (Airbnb): Layoff !== performance based my guy
• CcMG45 (Salesforce): You seem so naive to think layoffs are performance based 🤣🤣🤣
• MomDonny (Disney Streaming Services): It’s AI based. They just prompted layoff.md

Anthropic left us all behind (Blind)

• ci08t (Meta): Wow, they did what others have done long ago. What a feat.
• Jefry (Salesforce): So they just…reinvented Perforce?
• panda_muse (Meta): Slop work, slop blog and slop post

This turd director says he needs less engineers (Blind)

• ggh676"£- (Uber): Fewer engineers
• .horn dog (Meta): It’s one of the most mediocre teams in the company. Like extra low bar hires
• ⭐✨ (ex-Optum): Less engineers means less directors. He doesn’t know that

Netflix laid me off, and honestly, I don’t even want another SWE job. (Blind)

• KQUU11 (Netflix): I feel you. I’m sick of these Hunger Games.
• fndkdkne (ex-Block): TC or GTFO
• RenfieldD (Activision Blizzard): Setup your own rival streaming service, Feetpix

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When an answer has 41 million digits

Prime numbers are whole numbers divisible only by 1 and themselves. They are the indivisible building blocks of arithmetic: every whole number greater than 1 is either prime or can be factored into a unique collection of primes. Their definition is simple, but locating them becomes brutally difficult as the number line stretches outward.

Generated by Codex with GPT 5.6 Sol High

Techmeme surfaced Anthropic’s October 16 study, “How employment is changing at Anthropic”. Its most useful finding is not that AI has simply removed jobs. Inside one unusually AI-native company, agents have multiplied output while shifting the scarce resources toward human attention, judgment, and organizational context. Technical hiring continued to grow, but entry-level hiring lost share and more work moved from direct production into supervising, reviewing, and coordinating machines.

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Ukraine is holding Russia at the front, but the war is widening behind it. Russia’s new long-range drones and missiles are increasingly able to reach cities, railways, ports, warehouses and factories that once sustained a measure of normal life. The article’s central warning is that a nearly static map can conceal a deteriorating strategic position: Ukraine may prevent a major territorial breakthrough and still lose the economic depth needed to keep fighting.

Generated by Codex with GPT 5.6 Sol High

Musk suggested Trump restrict Ukraine’s Starlink service, Telegraph reports (r/worldnews)

• Reddit_2_2024: I encourage all Europeans to cancel Starlink subscriptions, as well as social media platform X usage, and to never purchase Tesla vehicles in response to this unhinged throttling of satellite service access to Ukraine who is defending its territory from illegal Russian special military operation.
• Chilluminatti: So Musk is back, he is gonna screw things up even more until everyone stops buying Teslas again and then he will dissapear for 6 months until sales have gone up again.
  
  The cycle just repeats itself
• NotAdrienBrody: Oh won’t someone rid us of this meddlesome Musk

Trump says neither he nor Musk responsible for Ukraine loss of Starlink access (r/worldnews)

• ObviouslyRealPerson: Trump, responsible?
  
  Trump only takes ownership for things that reflect well on him. Anything negative belongs to someone else or nobody at all.
• jpsreddit85: It’s always funny looking at things like this.
  Either they’re lying (probably) or they’re both so incompetent they don’t know who is calling the shots (also believable) or they know who did it but don’t want to say because it still makes them look bad (also probable).
  
  They’re both acting like they can pass the buck, but they are ultimately responsible either way.
• Wrong_Interview7513: “The Buck Stops Here”
  
  * Harry S. Truman 1945
  
  “I Don’t Know What The Fuck is Happening, right Elon?"
  
  * Donald J. Shitass 2026

Former Ukrainian president Yushchenko writes open letter to Trump (r/worldnews)

• krtyalor865: Whew! Anyone who supports Trump in all of this needs to READ this story.
  “Details: Yushchenko also reflected on events more than three decades ago, when the Soviet Union was breaking up.
  He noted that Ukraine had then possessed the world’s third-largest nuclear arsenal. “In negotiations with our allies, we agreed to give it up. We did so because we believed that a world governed by agreements was safer than a world governed by nuclear weapons."
  Quote: “In 1994, the United States of America, along with its partners, signed the Budapest Memorandum, providing Ukraine with official assurances of security, sovereignty, and the inviolability of our borders.
  They pledged not to threaten or use force against Ukraine. America assumed a moral responsibility toward Ukraine. So how can anyone today, when a treacherous enemy has attacked us, forget America’s signature on this document?” “
• SonofTreehorn: Trump’s actions will result in more countries seeking nuclear weapons to level the playing field.  He’s effectively removed the U.S. as a trustworthy ally.
• RadicalOrganizer: Yushchenko is a family friend. He is a good man and has gone through a LOT. And he is right, Trump is psychotic for siding with russia

Trump Suffers Double Inflation Blow Within 48 Hours as Midterms Loom (r/Economics)

• NOGOODGASHOLE: The best part is that the administration consistently says that the economy is doing great and spending is under control. And the polls say that 30% of Americans believe it.
• EtadanikM: The Trump administration believes inflation is a positive thing, because it allows them to inflate the gigantic debt they’re accumulating while weakening the dollar (which they want because they want to bring back manufacturing).
  But they need a way to sell it to their base who obviously are suffering for everything happening.
• Animal2: When republicans gain power, one always expects the US economy to go to shit at some point.
  They always institute poor policy in that regard, most notably massive tax cuts for the wealthy and then cuts to useful (often even money saving) services and then inflate military spending. But it can sometimes take a full term or multiple terms to really get things completely in the dumps.
  To have done this in just 2 years is kind of amazing and feels unprecedented in its incompetence (although I’m sure it’s weaponized incompetence put to use by hostile actors both in and outside of both government and the US itself).
  Things were going bad enough with the usual bad policy plus on top of it the Trump stuff like trade wars on all its allies. But then they really just jumped off a cliff with the Iran stuff. Wow.

U.S. budget deficit swells to almost \$2 trillion for fiscal 2026, up 12% in a single year (r/Economics)

• Rattus_NorvegicUwUs: Trump and the GOP, over 10 years, are responsible for 30% of all the debt this nation has ever accrued.
  It’s safe to say we need to throw this fact in their lying faces every single time they try to use the debt as an excuse to starve children or cut cancer research.
  
  The GOP are a failure. They have been hijacked by extremists who truly have no care for the fate of this nation if they can scurry off with more money than god.
  
  They all need to go. Every single last one of them. And never allowed back until they clean house and get adults back in the room.
• paperfire: I know Trump is terrible and he made the problem worse through his unfunded tax cuts, but the deficit is not all from him. It was huge with Biden too and he made no effort to close the deficit.
  The problem is America has a low fertility rate, is aging rapidly, and its mandatory spending on seniors through Social Security and Medicare is surging fast. There is no way to fix this without tax increases, the US is undertaxed relative to other OECD nations and needs more revenue to pay for its obligation to its growing senior population.
• Ravenluna798: He’s bankrupting us. Just like he bankrupted all of his companies.
  
  To all the people who voted for the “businessman” you’re idiots.
  God i wish we had better education here…

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Future is dark- winter is coming hard (Blind)

• OCI-HI (Oracle): Unfortunately, I think you are totally right.
• K7mt0joaft (Meta): 70% chance to retain the job!
• ,? (EATON): Tbh even without AI most companies can trim 30% and see no impact. There is a lot of bloat

Which Companies will have #1 AI Model in 2026? (Blind)

• lmfk21 (Walmart): Where’s Anthropic
• papa84 (Meta): Anthropic?
• fkxs04 (Amazon): Grok > OpenAI

Netflix almost 10% Across Eng Laid Off (Blind)

• sgrj44 (Netflix): i saved them \$1M/yr and was talking about promo too. canned regardless
• izeb46 (Bloomberg): I thought it was 6 percent.
• _anony🐭 (GoDaddy): Those damn H1Bs eh

Why is Meta becoming more toxic than Amazon? (Blind)

• anubisss (Meta): Culture is as good as its people. Hire toxic people expect toxic culture.
• NEmg86 (Meta): It’s team dependent but in general Meta is founder led and the founder is very trashy which has good upside and downside. PSC is way more aggressive than OLR.
  
  Amazon is far more diversified than Meta which means a lot more real work. Meta is comparatively over staffed given the nature of the business.
• Ciohang (Meta): What are you talking about? I came from Amazon as well and that place is way more toxic than Meta.
  
  How long have you worked at Amazon?

Laid off by Meta in Aug. Today I signed with Google for 40% more. (Blind)

• Woz Woz (Apple): Congrats 🎉
  Which were the 5 on-sites?
  Any pointers about your prep?
• toxicated (Meta): Level before after
• Egoisto (Walmart): Oh no, it’s that “apex” interview shill again 💩