Popular Product Identifier

You are given a list of product IDs sold in a store. Your task is to identify the product ID that is sold the most frequently. If there are ties, return the product ID that is numerically smallest. If no products are sold, return 'No products sold'. Input Format: - The first line contains an integer n, the number of products sold. - The next n lines each contain a single integer representing a product ID. Output Format: - Print the product ID that is sold the most frequently or 'No products sold' if n is 0. Example: Input: 5 101 202 101 303 202 Output: 101