Answer: Google SDE Interview Questions- 2025 January| Monotonic Stacks (2-in-1 Combo) |O

Solutions for Question 1: Largest Rectangle in Histogram Approach: Monotonic Increasing Stack A bar can expand left and right to form a rectangle AS LONG AS the neighboring bars are taller than or equal to it! The moment we encounter a bar that is shorter, the previous taller bars are completely blocked and their max area is locked in. We use a Stack to store indices of the bars. We strictly maintain a "Monotonically Increasing" stack. If we see a ...