Day: January 6, 2026

Picking an AI model in 2026 feels a bit like hiring a new teammate. On paper, everyone “does writing and coding.” In real life, one teammate is a lightning-fast brainstormer, another is a careful planner who won’t stop until the job is done, and another is the one you hire because you need everything to … Read more

Problem Overview In LeetCode 1161 (Maximum Level Sum of a Binary Tree), you’re given the root of a binary tree. Your task is to find which level (1-indexed) has the maximum sum of node values. Important details Key Insight To compute the sum at each level, the most natural technique is: ✅ Level Order Traversal … Read more