Which pattern is most helpful in implementing a dynamic pricing system that adjusts based on user input?

The Strategy pattern is particularly effective for implementing a dynamic pricing system that needs to adjust based on user input due to its design, which allows for defining a family of algorithms, encapsulating each one, and making them interchangeable. This is essential in a dynamic pricing scenario where pricing strategies may vary based on different factors such as user preferences, market conditions, or promotional discounts.

By utilizing the Strategy pattern, you can create multiple pricing strategies, each represented as a different class. For example, you might have a base pricing strategy, an event-based discount strategy, or a tiered pricing strategy based on user loyalty. When the user inputs specific criteria, the system can select the appropriate pricing strategy at runtime, apply the relevant algorithm to determine the price, and provide a tailored pricing solution that enhances user experience and optimizes revenue.

This flexibility and the ability to switch strategies seamlessly are crucial for a dynamic pricing system, making the Strategy pattern an ideal choice in this context.