Using one array also allows you to easily switch between the stack and queue operations, depending on your needs. Add your perspective Help others by sharing more (125 characters min.) Cancel ...

The `O(n)` solution is rather easy to think of. Just traverse the whole array and find out the index of the peek or valley. A more efficient solution would be to use __Binary Search__. Observing that ...

This project simulates a railway coach yard using a stack structure (LIFO). It manages coach arrangement with constraints like maximum capacity, no duplicates, priority coach handling, and type-based ...