A few years ago I solved 200 LeetCode problems and still froze on Mediums I hadn't seen. The breakthrough wasn't another hundred problems. It was a different loop. A problem asks for the longest substring with at most K distinct characters. You've solved sliding window before. Maximum sum subarray of size K, done. Longest substring without repeating characters, done. This third one stalls you. Twe
We’ve spent a week building, where we predefined every single step. But what if you don't know the steps in advance? What if the AI needs to decide whether to search Google, check a database, or use a calculator based on the user's question? This is where we move from "Chains" to Agents. If a Chain is a fixed railroad track, an Agent is a self-driving car. It has a destination (your goal) and a se