Inventory Price Matcher

You have two sorted lists of prices representing items in Warehouse A and Warehouse B. A price in Warehouse A is 'matchable' if there is at least one price in Warehouse B within a difference of K (inclusive). Count how many unique items (indices) in Warehouse A are matchable. Input Format: Line 1: An integer K. Line 2: Sorted prices for Warehouse A. Line 3: Sorted prices for Warehouse B. Output Format: A single integer representing the count of matchable items in Warehouse A. Example: Input: 5 10 20 30 15 25 Output: 3 (Explanation: 10 matches 15 (diff 5), 20 matches 15 or 25 (diff 5), 30 matches 25 (diff 5). All 3 match.)