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Quick facts

• Difficulty: MEDIUM
• Problem: Top K Frequent Elements
• Main tags: Array, Hash Table, Bucket Sort, Heap

What the problem is really asking

The input is an array of integers and a number k.

The task is not to sort the array itself. It is to:

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Quick facts

• Difficulty: MEDIUM
• Problem: Koko Eating Bananas
• Main tags: Array, Binary Search

What the problem is really asking

Koko has several piles of bananas and exactly h hours before the guards return. In one hour, she chooses one pile and eats up to k bananas from that pile. If the pile has fewer than k, she finishes it and the rest of that hour is wasted.

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Common Sense Fails at Cosmic Distance

Phil Plait’s column starts from an everyday rule that feels too obvious to question: farther things look smaller. That rule works well on Earth because familiar objects stay roughly the same size and because the space between observer and object is not changing in any meaningful way while light travels. The article’s central point is that this intuition breaks once astronomers look deep enough into the expanding universe. At extreme distances, a galaxy can appear larger on the sky even though it is farther away.

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What happened

Techmeme surfaced this April 20, 2026 story, and the original post is Kimi K2.6 Tech Blog: Advancing Open-Source Coding.

Moonshot is positioning Kimi K2.6 as more than a routine model refresh. The company says it is open sourcing a new model centered on long-horizon coding, agent-style execution, coding-driven design, proactive agents, and a research preview called Claw Groups. In practical terms, the launch is framed as an attempt to make open models feel capable not just in isolated code generation tasks, but across the broader workflow that increasingly defines modern AI-assisted software work: planning, tool use, extended sessions, parallel sub-agents, and end-to-end execution.

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What this article is about

This summary covers The Economist’s April 11th, 2026 Science & technology article listed in the contents as AI mathematicians and published under the headline One step at a time.

The article argues that artificial intelligence is becoming useful not just for crunching numbers, but for doing one of mathematics’ slowest and most exacting jobs: turning ideas and draft arguments into proofs that other mathematicians can formally verify. The promise is not that AI has suddenly become a replacement for mathematicians. It is that AI may help remove a trust bottleneck that has long slowed the field.

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Tom Webster’s article tackles one of the most stressful moments in cross-country flying: arriving over an unfamiliar field with too little information about the surface wind and too little altitude to waste. His argument is simple but persuasive. Away from a home site windsock, pilots need an observation habit that still works when the obvious clues are missing, the instrument is unreliable, and there is no time for elaborate setup.

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Jan. 6 rioter pardoned by Trump gets prison sentence for possessing ’enormous child pornography collection’ (r/news)

• Honeycove91: Pretends to be shocked
• Th1rte3n1334: Exactly the only thing you can do is feign shock. The very same people that supported Trump because the democrats are all satanic pedophiles turned out to be the pedophiles themselves. It’s projection, and every accusation is an admission.

Texas megachurch pastor Robert Morris is free after 6 months in an Oklahoma jail for child sex abuse (r/news)

• Darksmithe: Trump loves his pedophile pals.
• kia75: Diddling children? Forgiveness. Wearing a tan suit? God will never forgive that. Starting wars and military slaughters? Immediate forgiveness. Helping people get healthcare? Never forgive!

Supreme Court rules against Colorado ban on ‘conversion therapy’ for LGBTQ kids (r/news)

• effortfulcrumload: The satanic temple should open a conversion therapy camp for straight kids
• perdy_mama: No, the should have a conversion for Christians kids. These camps aren’t for anyone except bigoted Christian parents.

Kash Patel’s Erratic Behavior Could Cost Him His Job (r/UnderReportedNews)

• Musicman1972: For sure. I mean this administration has its problems but being erratic is just not acceptable. From the top down it’s stability all the way right …
• Nazz1968: I think he drinks heavily because he knows he isn’t remotely qualified for the job, and also knows that Trump will cast him aside on a whim. Noem and Bondi were two of the biggest names as Trump loyalists, and look where they are now. Hopefully the article will accelerate his dismissal. He’ll really have something to drink about when his country singer girlfriend dumps him immediately because the perks are gone. No more FBI jet travel, boo-hoo.

The Unconstitutionality of the Trump Administration’s New Executive Order on Elections (r/politics)

• PopPalsUnited: Executive orders are not laws and do not have to be followed.
• elarivyx: Exactly, they’re not laws but they still carry legal weight until challenged, so it’s not something people can just ignore.

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Honestly, how far is the AI-induced layoff? (Blind)

• dumpy: For junior, 2-3 years. Mid-level, 3-5 years. Senior, 5+ years. You’ll always need some high level engineers, those probably won’t go away.
• beastmode$: If AI can do any coding task, nothing is stopping the laid off people from creating competitors to the big names. We will see a startup boom.

Layoff due to AI (Blind)

• n0pants: AI is just an excuse. When they say they are letting go employees because of AI they are trying to fool the investors and reduce the head count at the same time.
• TKTf28: AI is the last desperate attempt at keeping surveillance capitalism going and more importantly stopping a revolution triggered by the implosion of the whole economic and political system. 2024 is the end of the road for US dollar and its reserve currency status. War and layoffs are their way of saying we are willing to stay in power at any cost. They do not want to give up control. Generative AI is.a joke and a distraction.

Tech industry lays off nearly 80,000 employees in the first quarter of 2026 — almost 50% of affected positions cut due to AI (r/technology)

• realteamme: almost 50% of affected positions CLAIMED TO BE cut due to AI
• DarthJDP: Due to failing data center investments sucking up cashflow and income. Economy is terrible due to tariffs, war, and other mismanagement. AI is replacing exactly no one. Slop is replacing workers and delivering worse results.

AI Leads All Reasons For U.S. Job Cuts In March, Report Says (r/technology)

• VincentNacon: No… Greed, greed is the real reason why they’re doing the layoff. They wanted to save money, so they valued that more than the person… and ironically, more than their products.
• Just-Install-Linux: I’m in IT and just don’t see AI really taking over at all. We use it, but not in a way that it replaces people. I think the economy just sucks and companies avoid tanking their stock by saying it’s due to the increased productivity of AI instead of the reality of hard times.

Oracle slashes 30,000 jobs with a cold 6 a.m. email (r/cscareerquestions)

• Outrageous_Duck3227: 30k gone in an email so corpos can massage debt numbers, and we’re all job hunting in hell
• thisisjustascreename: Sounds like Oracle management are to blame for the misallocation of capital.

‘Another internet is possible’: Norway rails against ‘enshittification’ (r/technology)

• emotional_program0: Considering how poorly Norwegian politicians have been doing when it comes to IT, AI, etc, I wouldn’t. This campaign is from Forbrukerrådet which is an absolutely amazing organization, but they don’t really have any power (sadly!).
• Dear_Chasey_La1n: I don’t think the inaction on AI is per se a sign of weakness, but possibly long term when it all comes down a saviour. Look at Meta, dumping hundreds of billions in AI to the point they need to reduce staffing to support their own absurdity. How can anyone sit back and think that makes sense, investing in tech that’s dated in 3 years from now. Think about it, 100 billion is worth 0 in 3 years. Yet at no point is any AI company (fuck that very term, they are LLM’s at best) actually really profitable or successful. For Europe and Norway with it, to spend time to safeguard the society against AI is for the better, we should praise them for taking it slowly. There is nothing to gain from AI, but countless companies, pension funds, banks will loose money it will make 2008 look like spongebob losing bikinibottom.

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A ski career stretched into politics without losing its center

Susan Mangion’s “The Mountain Bellwether” treats Caroline Gleich’s 2024 U.S. Senate run less as a detour from skiing than as a change in altitude. Gleich enters the article as a familiar kind of mountain figure, a professional ski mountaineer whose public identity is built on bright outerwear, big objectives and years of climate and public-lands advocacy. What makes the piece interesting is that Mangion refuses to frame politics as a betrayal of that identity. Instead, she argues that Gleich’s campaign was an extension of the same commitments that already defined her life in the mountains.

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Quick facts

• Difficulty: HARD
• Problem: Word Search II
• Main tags: Array, String, Backtracking, Trie, Matrix

What the problem is really asking

The input gives a letter grid and a list of candidate words. A word is valid if it can be traced through horizontally or vertically adjacent cells without reusing the same cell inside that one word.