The O(n) Club: Keys and Rooms—How to Unlock a Mansion Without Losing Your Mind (or Your Java Stack)
The O(n) Club: Keys and Rooms—How to Unlock a Mansion Without Losing Your Mind (or Your Java Stack) ⚡ TL;DR You wake up in room 0 of a…
The O(n) Club: Redundant Connection — Java’s Answer to Annoying Cycles
The O(n) Club: Redundant Connection — Java’s Answer to Annoying Cycles ⚡ TL;DR Some smart aleck added an extra edge to your tree, turning it…
The O(n) Club: Critical Connections in a Network: The Java Tarjan, Unplugged
The O(n) Club: Critical Connections in a Network — The Java Tarjan, Unplugged ⚡ TL;DR Finding bridges (aka critical cables) in a network:…
The O(n) Club: Network Delay Time, Java, and Your Shortcut to Dijkstra’s Fame
The O(n) Club: Network Delay Time, Java, and Your Shortcut to Dijkstra’s Fame ⚡ TL;DR Picture a network where you yell “coffee’s ready!” down…
The O(n) Club: Reconstruct Itinerary (JFK Edition): When Your DFS Hits Turbulence
The O(n) Club: Reconstruct Itinerary (JFK Edition): When Your DFS Hits Turbulence ⚡ TL;DR Given a suitcase full of flight tickets, your…
The O(n) Club: Is Your Graph Bipartite, or Just Awkward?
The O(n) Club: Is Your Graph Bipartite, or Just Awkward? ⚡ TL;DR Want to know if your graph can join the exclusive Bipartite Club? Try…
The O(n) Club: Counting Socially Awkward Provinces (LeetCode 547, With Less Anxiety)
The O(n) Club: Counting Socially Awkward Provinces (LeetCode 547, With Less Anxiety) ⚡ TL;DR Stuck with a matrix where isConnected[i][j] tells…
The O(n) Club: Minimum Height Trees, or How to Avoid Roast CPU
The O(n) Club: Minimum Height Trees, or How to Avoid Roast CPU ⚡ TL;DR If you’re about to brute-force every possible root in a tree to…
The O(n) Club: Course Schedule II’s Topological Soap Opera
The O(n) Club: Course Schedule II’s Topological Soap Opera ⚡ TL;DR LeetCode 210 is just course scheduling pretending to be about academics.…
The O(n) Club: Course Schedule (LeetCode 207): How Not to Major in Infinite Loops
The O(n) Club: Course Schedule (LeetCode 207): How Not to Major in Infinite Loops ⚡ TL;DR This is a “can you finish all your…