Write an interactive program that will monitor the flow of patients in a large hospital. The program should account for patients who check in and out of the hospital and should allow access to information about a given patient. In addition, the program should manage the scheduling of three operating rooms. Doctors make a request that includes a patient's name and a priority value between 1 and 10 that reflects the urgency of the operation. Patients are chosen for the operating room by priority value, and patients with the same priority are served on a first-come, first-served basis. The user should use either one-letter or one-word commands to control the program. As you design your solution, try to identify the essential operations (excuse the pun) that you must perform on the data, and only then choose an appropriate data structure for implementation. This approach will allow you to maintain the wall between the main part of the program and the implementations.