The O(n) Club: Non-decreasing Array — Change Once Or Never
The O(n) Club: Non-decreasing Array — Change Once Or Never ⚡ TL;DR This LeetCode classic asks: Can you rescue your out-of-order array by…
The O(n) Club: Best Time to Buy and Sell Stock with a Transaction Fee (Or, How to Not Get Fleeced by the Middleman)
The O(n) Club: Best Time to Buy and Sell Stock with a Transaction Fee (Or, How to Not Get Fleeced by the Middleman) ⚡ TL;DR Maximize stock…
The O(n) Club: The Skyline Problem — Heap, Sweep, and the Art of Urban Java
The O(n) Club: The Skyline Problem — Heap, Sweep, and the Art of Urban Java ⚡ TL;DR Given a row of buildings, your job is to chart those…
The O(n) Club: Two Oddballs, One XOR Trick – Solving Single Number III Without the Hashmap Hype
The O(n) Club: Two Oddballs, One XOR Trick – Solving Single Number III Without the Hashmap Hype ⚡ TL;DR You’ve got an int array where…
The O(n) Club: Single Number II: That One Rogue Bit Nobody Likes
The O(n) Club: Single Number II—That One Rogue Bit Nobody Likes ⚡ TL;DR Given an array where every number appears three times except one…
The O(n) Club: Contiguous Array: Find Your Zen Between 0s and 1s
The O(n) Club: Contiguous Array—Find Your Zen Between 0s and 1s ⚡ TL;DR Want the longest streak where your array plays fair and tallies the…
The O(n) Club: Find K Closest Elements and Avoid Interviewer Ambushes
The O(n) Club: Find K Closest Elements and Avoid Interviewer Ambushes ⚡ TL;DR If you’re asked for k elements closest to x in a sorted array,…
The O(n) Club: How to Handle Array Doppelgängers Without Losing Your Sanity
The O(n) Club: How to Handle Array Doppelgängers Without Losing Your Sanity ⚡ TL;DR This is that magical Leetcode problem where duplicates…
The O(n) Club: Max Consecutive Ones III: Where Sliding Windows Beat Your WiFi and Your Bugs
The O(n) Club: Max Consecutive Ones III—Where Sliding Windows Beat Your WiFi and Your Bugs ⚡ TL;DR Want to binge 1s in your binary array by…
The O(n) Club: Dungeon Game – Save Your Knight, Your Code, and Your Sanity
The O(n) Club: Dungeon Game – Save Your Knight, Your Code, and Your Sanity ⚡ TL;DR You’ve got a grid of rooms, each giving or stealing…