The O(n) Club: Reverse Words in a String – Where Your Spaces Go to Sabotage You
The O(n) Club: Reverse Words in a String – Where Your Spaces Go to Sabotage You ⚡ TL;DR Given a messy string like ” Hello World from…
The O(n) Club: Remove All Adjacent Duplicates in String — Now With 100% Less Regret Than Brute Force
The O(n) Club: Remove All Adjacent Duplicates in String — Now With 100% Less Regret Than Brute Force ⚡ TL;DR Stuck deleting every pair of…
The O(n) Club: Merge Sorted Arrays — Why Going Backwards Is Forwards Thinking
The O(n) Club: Merge Sorted Arrays — Why Going Backwards Is Forwards Thinking ⚡ TL;DR Trying to merge two already sorted arrays (LeetCode 88)…
The O(n) Club: Find K Pairs with Smallest Sums — Now with 93% Less Suffering
The O(n) Club: Find K Pairs with Smallest Sums — Now with 93% Less Suffering ⚡ TL;DR Find k pairs with the smallest sums by using a…
The O(n) Club: Find the Town Judge (LeetCode 997) — Java Edition for Trust Issues
The O(n) Club: Find the Town Judge (LeetCode 997) — Java Edition for Trust Issues ⚡ TL;DR This problem is about sniffing out that one person…
The O(n) Club: Find the Town Judge—Or the Search for the Ultimate Influencer
The O(n) Club: Find the Town Judge—Or the Search for the Ultimate Influencer ⚡ TL;DR You’re looking for the one person in town everyone…
The O(n) Club: Roman to Integer — Why Does ‘IX’ Always Betray Me?
The O(n) Club: Roman to Integer — Why Does ‘IX’ Always Betray Me? ⚡ TL;DR Roman numerals aren’t just fancy birthday cake icing—they come…
The O(n) Club: Maximum XOR of Two Numbers in an Array: Ditch Loops, Grab Bits
The O(n) Club: Maximum XOR of Two Numbers in an Array: Ditch Loops, Grab Bits ⚡ TL;DR Find the biggest XOR between any two numbers in an…
The O(n) Club: Implement Queue Using Stacks — Stacking Your Odds
The O(n) Club: Implement Queue Using Stacks — Stacking Your Odds ⚡ TL;DR Turn two cranky stacks into a well-behaved queue. Only flip stacks…
The O(n) Club: Pairs of Songs With Total Durations Divisible by 60 — Now That’s What I Call Modulo!
The O(n) Club: Pairs of Songs With Total Durations Divisible by 60 — Now That’s What I Call Modulo! ⚡ TL;DR If you want to pair up songs so…