Low Level Design, Object Oriented, Graph Data Structure, Hashmap, Interview Questions.
self.seller_products[seller_id].add(prod_id) self.product_seller[prod_id] = seller_id # Relationship b/w product and price self.product_price[prod_id] = price # Relationship b/w product and categories if prod_id not in self.product_categories: self.product_categories[prod_id] = set() for cat_id in