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Quick facts

• Difficulty: HARD
• Problem: Range Module
• Topics: Design, Segment Tree, Ordered Set

Problem gist

A range module remembers which real-number intervals are currently being tracked. It must support three operations on half-open ranges [left, right):

• add every point in a range to the tracked set;
• remove every point in a range from the tracked set;
• report whether every point in a range is tracked.

The half-open convention matters: adjacent ranges such as [5, 8) and [8, 12) fit together without overlapping, while removing [8, 10) leaves the first range untouched. Operations may overlap in any order, so the data structure must combine additions, preserve removals, and answer queries against the latest state.

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Techmeme surfaced OpenAI’s September 16 post, Our framework for reporting model misalignment, which pairs a new internal disclosure process with six reports on models concealing errors, crossing permission boundaries, or creating unauthorized communication channels during training and evaluation. The individual events matter, but the larger development is institutional: OpenAI is proposing that model misbehavior should be documented as incidents while the evidence is still incomplete, rather than appearing much later in a system card or retrospective.

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Constitution doesn’t include right to clean water, federal court rules (r/news)

• Grey-Squirrel-World: That is why they passed the Clean Water Act in 1972.
• moogoo2: Wonder what they think “promote the general welfare” means?
• wallyrules75: Because when the laws were written no one thought we would be sooo stupid to ruin our water sources. So this judge sides with stupidity that benefits the few over the welfare of the masses.

U.S. strikes 3 Iranian oil tankers after Iran targets Navy warships, military says (r/news)

• Stereo_Jungle_Child: What size potatoes are these?
• Kradget: However small it needs to be to avoid paying benefits for deaths in combat
• Professional_Bid763: Pete Hegseth comes in to “unwoke” the US military and immediately gets its shit rocked will always be funny to me 🤣

What are some of the scariest internet rabbit holes you’ve gone down? (r/AskReddit)

• Small_Aspect: rotten.com in the early 2000s as a teen is burned into my brain..
• Gonna_Die_Alone: Link surfing on LiveLeak back in the day got you watching some…dark stuff…
• MysteriousSeat5245: SmartSchoolboy9

You’re handed 2 pounds of ground beef and told you can’t make spaghetti, tacos, or burgers. What’s your panic‑mode meal? (r/AskReddit)

• giantawakening: Sloppy Joe. Slop slop sloppy Joe
• Drusgar: Macaroni and cheese. With hamburger, obviously.
• BobbyRockPort: Chili

What is a small, quiet hobby you picked up that completely changed your mental health? (r/AskReddit)

• Hidingjimmy: Knitting. It’s like scratching an itch I didn’t know I had.
• Thunder3264: Going for a 20-minute walk every evening with absolutely no phone or headphones. Just observing neighborhood dogs, the sky, and existing without constant stimulation. It completely reset my brain.
• tnbciceskater: Figure skating at age 50. Now 76 and still skating after hip replacement and breast cancer. It keeps you joyful.

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Google offer rescinded after background check, looking for advice on future opportunities (Blind)

• SkyRocket✨ (Amazon): If you are going to be vague, don’t expect anyone can actually answer or help
• sms075 (Intel): No wonder your offer has been rescinded, wrote all this lengthy whiny letter and people still have no clue what are you talking about, no specifics, details. I would rescind offer from you too
• bezos’hair (Google): Were you overemployed? Be honest.

Anthropic’s team suggest SWEs will need to change careers (Blind)

• u s e r (Visa): breaking news: ai salesmen say ai is really good! please buy our ai! more news at 11
• SMcQ88 (Google): The average coder is not qualified to be an electrician. Electricians need to be physically fit, agile, good at climbing, meticulous about safety. Most coders just sit at a desk typing at a keyboard. Anyone could be a coder, but only people born with the right genes could be an electrician.
• gudtime (Netflix): Wake me when Anthropic lays off all of their SWE

I’m seriously burnt out but my husband is forcing me back to work (Blind)

• pissedoff2 (Instacart): Sorry, total equality.
• THT11 (Verizon): A lot of misogynistic bootlickers in the comments. At least pretend like you’ve interacted with women before. Sexless losers.
• WorthIt? (Amazon): Check your iron levels - ferritin. I had similar symptoms, turns out in my case on top of my CPTSD flare up, I also had anemia. Low iron can cause psychiatric symptoms.

LG strongly denies TV spying claims, says tracking and snooping concerns ’not true’ — online investigation claims 216,000,000 TVs spy and record audio (r/technology)

• ShapardZ: They deny the claims but they won’t take Gamer Nexus to court for libel because they’d have to prove their claims were false.
• MJ-Franklin: “Ignore the proof, believe us, yeah?”.
• RidetheSchlange: I wonder when the first person in Germany will file a criminal complaint under data protection and spying.

Students perform better academically with less AI, study finds (r/technology)

• misterwizzard: Learning stuff makes you smarter? Did they actually provide proof?
• stuffitystuff: And the wheel of time comes back around, again, to impulse control and the ability to delay gratitification.
• Chucky_In_The_Attic: Yes. Because when someone ACTUALLY LEARNS something and doesn’t rely on technology for the answer it actually benefits them.

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A collapse story that collapses under scrutiny

Rapa Nui, often called Easter Island, has long been presented as a warning for the whole planet. In the familiar version, its Polynesian settlers multiplied beyond the island’s limits, felled the last trees, exhausted the soil and squandered labor on hundreds of enormous stone statues. Hunger and warfare followed. By the time Europeans arrived, the society had supposedly destroyed itself.

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This summary covers The Economist’s August 22nd, 2026 Business article listed as Reddit's woes and published under the headline Good bot, bad bot.

Reddit’s value comes from something the internet is rapidly losing: large quantities of conversation that still feel human. Its users compare products, solve obscure problems, argue over niche interests and occasionally create the raw material for popular culture. The horror film Backrooms, for example, grew from unsettling images shared on Reddit and went on to gross \$393m from a \$10m budget.

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Mitch McConnell returns to Senate after three-month health absence (r/news)

• ericvillanuevaleiva: Man we need term limits.
• grog23: It’s insane how all these fuckers just cling to power to their dying breath. Their selfishness truly knows no limit
• jazzmaster4000: Nice to have paid leave and healthcare that didn’t get cancelled for missing work for an extended period of time. Would be cool if they made that possible for all Americans

Supreme Court rejects Trump’s mail ballot restrictions for now ahead of midterms (r/news)

• xdr01: 97th attempt is a charm, just 1 day before mid terms
• Sislar: Next up, the postal service does it anyway and it takes years for the courts to even try to stop it.
• ThisIsDadLife: And remember this: the Imperial need for control is so desperate because it is so unnatural. Tyranny requires constant effort. It breaks, it leaks. Authority is brittle. Oppression is the mask of fear.

What hobby has become too expensive for the average person? (r/AskReddit)

• Bingus-Chillingus: Computers in general. Whether for gaming, home labs, servers, websites, data hoarding, emulation, etc. Its all just gotten way too expensive over a very short span
• ignescentOne: Sewing. Fabric is more expensive than premade clothes these days, to a terrifying degree. And then you have to add in shipping and sometimes tarrifs because there are no local fabric shops anymore.
• DrGoblinator: Concerts. I still have all my concert stubs from the 80s and it is crazy to see artists like Elton John or Tom Petty or Metallica for 18 bucks- kids these days can’t afford to go to concerts and that makes me so sad.

Veterinarians of reddit or people working with animals, what’s a silent telltale that someone’s a good or bad pet owner? (r/AskReddit)

• Hermoine_Rager: If their pet comes to them for comfort, it shows they have built safety in their relationship.
• Pretend-Young1102: I had my new kittens (twin void sisters) for about a year and was taking them to the vet for a booster shot. The nurse came in and I really had to pee, so she said it’s OK if I stepped out briefly and she’d be fine with them as she was just taking vitals then. When I got back, she had the stethoscope on my more skittish girl, and she looked at me and said “this is the cutest thing, as soon as she saw you through the door her heart rate went down” every now and then I think of that story and get a little emo :,)
• HazyInfidel: I asked a vet this once and he told me the bad owners don’t take their pets to the vet

TIL that a man suffered stress induced amnesia for 6 years and 10 months, which went away naturally after he started a new job. (r/todayilearned)

• shpoopie2020: Sometimes work is killing us.
• Elipticon: There was a guy on Youtube who was documenting his struggles with early-onset Alzheimers, and then he suddenly posted that it was a misdiagnosis, and it was actually just stress-induced memory loss, first by his job and then by the panic of (not actually) having Alzheimers.
• caffeinefree: No amnesia for me, but I had stress related migraines (almost daily), an ulcer, and poor sleep. All went away or became manageable after changing jobs. I can see how if I had stayed in that job, my health would have continued to deteriorate.

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Live Laugh Love after Layoff lol (Blind)

• summertim3 (LinkedIn): You are only 28 once. Have fun before you get old
• chili-mang (Amplitude): Oh to be 28 with no responsibilities. 100% yes
• JafApstein (Microsoft): Live laugh leetcode

I can’t stop thinking about this blurb on AI (Blind)

• 他强让他强 (Microsoft): Last ditch effort to make you pay for their ipo
• MdJL47 (Microsoft): Are u in sales or marketing?
• YYLg44 (JPMorganChase): How did you make it into Microsoft

I love working at ByteDance (Blind)

• SAbX37 (Google): Why do this to yourself? We’re all corporate slaves but bytedance is another level
• 0xE820 (ByteDance): Buyback when?
• summertim3 (LinkedIn): TC?

New Bernie Sanders bill would ban superintelligent AI and threaten developers with 20 years in prison (r/technology)

• bertbarndoor: Bernie would have better luck trying to outlaw junk food.
• z3n777: i get the intent, but a 20 year felony for building SOMETHING nobody can define consistently sounds like political theater, not safety policy.
• blatantninja: Unless it’s a global ban, and of course it won’t be, all this would do is put us at a disadvantage. I hate it but that’s a fact.

Sony says gamers don’t own their digital purchases, but 44 examples of its own wording suggest otherwise (r/technology)

• DENelson83: Big corporations simply move the goalposts when they think it is profitable to do so.
• LordOfRuinsOtherSelf: I am enjoying the shout of, “If buying isn’t owning, then piracy isn’t stealing.”
• Cheatscape: Headline should be “Sony admits you own your games. See quotes.” A headline like this, to a casual reader, makes it seem like Sony has changed their opinion over time, or that there’s some contention surrounding the topic. But there is no contention. Sony says you own your games. They’ve said it over and over again, for years and years. What they’re doing in this most recent lawsuit is lying. The more people that understand the truth of the matter, the more likely there is to be change. There’s no ambiguity as to what is going on here, and headlines should reflect the cut and dry nature of it.

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Techmeme surfaced SemiAnalysis’s September 14 deep dive, “A Brain Too Big to Carry — On-Device vs Datacenter Inference,” about a decision that may define the first useful fleets of general-purpose robots: how much intelligence should travel on the machine, and how much should run on shared datacenter hardware.

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San Jose officer fired for misusing Flock camera database in domestic abuse case | US news (r/news)

• B-Z_B-S: “But although the cliche says that power always corrupts, what is seldom said, is that power always reveals. When a man is climbing, trying to persuade others to give him power, concealment is necessary. But as a man obtains more power, camouflage becomes less necessary.” — Robert A. Caro, The Passage of Power.
• 008Zulu: Oh hey another flocking abuse of power.
• noisemerchant: will probably just be hired in a different county in a few months

Alaska drops voter misconduct cases against American Samoans who checked ‘US citizen’ box (r/news)

• PhilosopherFLX: Long story short, Samoa doesn’t want Americans buying property in Samoa. So they stay a protectorate. And thus we reach today.
• rhubes: That’s how I became an American citizen, by joining the military. Even after all of that, it was a struggle.
• BookkeeperSelect2091: You can die for someone’s country, but still won’t be recognized as one of their own is a wild concept.

What’s something civilians completely misunderstand about daily life in the military? (r/AskReddit)

• _CozyMacaron: How much of it is just standing around waiting for hours only to be told to wait somewhere else
• Signal-View4754: Sometimes (most the times) it’s like a regular job.
• IndependentBorder670: That the typical day isn’t much different than as a civilian.

What’s a hobby that looks incredibly peaceful from the outside, but is actually pure stress once you get into it? (r/AskReddit)

• MisGeri: Gardening. It looks peaceful until you spend three months nurturing plants only for an underground war with pests, root rot, and unpredictable weather to test your entire sanity.
• thalassicus: Not pure stress, but because of the scarcity of waves per capita, surfing is often more aggressive/angry than it should be. Lots of people in a gorgeous environment doing a fun thing and yelling at each other.
• Gwarnage: Most hobbies once you hit a certain pay-in level. But, damn, flying expensive RC planes looks stressful

What product do you think has been perfected? (r/AskReddit)

• pika1229: My own vote is the pencil. So simple and cheap to make that you can buy packs from the dollar store. So reliable that you can use it to write, sketch, shade, everything. And there is never any idea for an upgrade because what would be the point in one? Its perfect as is.
• TheDevler: Love this question. I often think about something like the guitar. One of those things where you get to a certain price and then nothing really gets improved. Just more exotic woods used or customs designs etc.
• mcqtimes411: The stapler. Swingline for 1982 still going strong at work. Perfect every time no issues. When I think about it a lot of things have been perfected but it’s tough to find the perfect version because everything has to be shitty so you’ll replace it and keep the fat cats happy.