The Quest Begins (The "Why") I still remember the first time I faced the “Next Greater Element” interview question. The array looked innocent enough, but every brute‑force attempt felt like I was hammering a nail with a sponge— O(n²) time, nested loops, and a sinking feeling that I was missing something elegant. I spent an hour sketching out the problem on a whiteboard, muttering, “There has to be a way to look ahead without looking back every single time.” That frustration is a rite o...