Gourmet Jan compared n restaurants (n is a positive integer). Each pair of restaurants was compared in two categories: tastiness of food and quality of service. For some pairs Jan couldn't tell which restaurant was better in one category, but never in two categories. Moreover, if Jan thought restaurant A was better than restaurant B in one category and restaurant B was better than restaurant C in the same category, then A is also better than C in that category. Prove there exists a restaurant R such that every other restaurant is worse than R in at least one category. combinatoricsgraph theoryPoland