Proposed changes amazon interview

[vipulbalina]

Result.getServedBuildings(...) method:
Two approaches were explored:

Naive simulation using array updates based on each router’s range.

Optimized solution using a prefix sum (difference array) to improve performance for larger inputs.

Router helper class:
Encapsulates the router’s location and range for clarity and maintainability.

FastReader utility class:
Enables efficient input parsing in a competitive programming format.

main() method:
Reads input, processes the data, and prints the number of buildings that are adequately served.