LeetCode MEDIUM 34 Find First and Last Position of Element in Sorted Array Summary

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Quick facts

What the problem is really asking

The input array is sorted, and the target value may appear many times in one contiguous block.

The task is not just to decide whether the target exists. It is to return the exact starting and ending indices of that block.

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LeetCode MEDIUM 49 Group Anagrams Summary

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Quick facts

  • Difficulty: MEDIUM
  • Problem: Group Anagrams
  • Main tags: Array, Hash Table, String, Sorting

What the problem is really asking

Two strings belong in the same group if they use the exact same letters with the exact same counts, just in a different order.

So the problem is not really about comparing every string against every other string. It is about finding a stable “signature” for each word, so all words with the same signature land in the same bucket.

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LeetCode MEDIUM 54 Spiral Matrix Summary

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Quick facts

  • Difficulty: MEDIUM
  • Problem: Spiral Matrix
  • Main tags: Array, Matrix, Simulation

What the problem is really asking

The input is a 2D matrix. The task is to return every value exactly once in spiral order:

  • go left to right across the top
  • then top to bottom down the right side
  • then right to left across the bottom
  • then bottom to top up the left side
  • keep repeating until there is nothing left

This is a traversal problem. Nothing in the matrix needs to be modified. The only challenge is knowing when to turn and when a side has already been fully consumed.

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LeetCode MEDIUM 55 Jump Game Summary

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Quick facts

  • Difficulty: MEDIUM
  • Problem: Jump Game
  • Main tags: Array, Dynamic Programming, Greedy

What the problem is really asking

Each position tells how far the player is allowed to jump from that spot.

The goal is not to find the minimum number of jumps. It is only to decide whether the last index is reachable at all.

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Scientific American 202511 Meteorite Heist Summary

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A space rock became a cultural crime scene

Dan Vergano’s article starts with a meteorite that is scientifically extraordinary but locally familiar. Near the Somali village of El Ali, the 13.6-metric-ton iron-and-nickel mass known as Shiid-birood, or “the iron rock,” sat in the landscape for generations. People folded it into stories and songs, chipped bits of iron from it, used it as a whetstone, and treated it less like a museum object than like part of the region’s lived history.

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Techmeme 20260411 Google Says Polymarket Bets Showing Up in News Was an Error Summary

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What happened

Techmeme surfaced this story in its April 11, 2026 roundup, and the original article is Terrence O’Brien’s Google says Polymarket bets showing up in News was an “error”.

The Verge reports that Google News briefly displayed links to Polymarket betting markets alongside coverage from conventional news outlets. One example placed a market about ship traffic through the Strait of Hormuz under search results that also included reporting from outlets like Reuters and The Guardian. Google later removed the results and said Polymarket was not supposed to appear in Google News at all.

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The Economist 20260328 Amazon's AI Spending Gamble Summary

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What this article is about

This summary covers The Economist’s March 28th, 2026 Business article listed in the contents as Amazon and published under the Schumpeter column with the headline The Bet-Everything Store.

The article argues that Amazon is making the biggest spending bet in its history in order to regain momentum in artificial intelligence. The core question is whether this is an undisciplined burst of spending or a calculated attempt to protect AWS, its most valuable business. The piece comes down on the side of cautious optimism: the bill is enormous, but Amazon has real strategic reasons for taking it on.

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USHPA Pilot Vol56-Iss2 The Four Skills of a Graceful Landing Summary

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John Matylonek’s article makes a useful argument against a common belief in hang gliding: awkward landings are not usually proof that the aircraft is inherently hard to land. More often, they are the visible end of a chain of small errors in setup, trim, body position, and timing. A graceful landing, in his telling, is less about athleticism than about giving the glider the conditions it needs to finish the flight cleanly.

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2026-04-11 Social Briefing Summary

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EARTHSET: Artemis II captures their first photo from the far side of the moon (r/space)

18-month New Yorker investigation finds OpenAI’s Sam Altman lobbied against the same AI regulations he publicly advocated for (r/technology)

Oracle fired up to 30,000 workers via email after a 95% profit surge (r/technology)

Iranian missile blitz takes down AWS data centers in Bahrain and Dubai (r/technology)

Anthropic stayed quiet until someone showed Claude’s thinking depth dropped 67% (r/ClaudeCode)

Software quality has significantly decreased (r/cscareerquestions)

How to maintain H-1B status after layoff (Blind)

2026-04-11 Social Techmeme Reddit Briefing Summary

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WTF Claude. Weekly limits = 4x5hr limits(r/ClaudeCode)

Software quality has significantly decreased(r/cscareerquestions)

OpenAI Backs Bill That Would Limit Liability for AI-Enabled Mass Deaths or Financial Disasters(r/technology)

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

META layoffs(r/cscareerquestions)

Pause on LinkedIn Staff Interviews(Blind)

  • LIngerie: layoffs are coming in early May and the interview pause basically confirms it
  • interπŸŽ‰πŸŽ‰πŸŽ‰: a recruiter said the staff role being interviewed for was eliminated until July
  • mhqv58: a first-round interview was canceled because the role is now frozen

Anthropic work culture(Blind)

  • stupidswe: they argued the offer was a pay cut once you price in 60 to 80 hour weeks
  • Jaсօb: building a new god was framed as reason enough to accept 60 hour weeks
  • mnG2b8: at Anthropic or OpenAI the expectation is to deliver at all costs rather than set your own hours