Hospital

namespace P04.Hospital
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    class Hospital
    {
        static void Main()
        {
            var patients = new List<Patient>();

            string input;
            while ((input = Console.ReadLine()) != "Output")
            {
                string[] inputArgs = input.Split();
                string departmentName = inputArgs[0];
                string docFisrtName = inputArgs[1];
                string docLastName = inputArgs[2];
                string doctorName = $"{docFisrtName} {docLastName}";
                string patientName = inputArgs[3];

                Patient patient = new Patient(departmentName, doctorName, patientName);

                patients.Add(patient);
            }

            string output;
            while ((output = Console.ReadLine()) != "End")
            {
                string[] outputArgs = output.Split();
                if (patients.Any(p => p.Department == outputArgs[0]))
                {
                    if (outputArgs.Length == 1)
                    {
                        foreach (var patient in patients
                            .Where(p => p.Department == output))
                        {
                            Print(patient);
                        }
                    }
                    else
                    {
                        var departmentPatients = new List<Patient>();
                        int roomNumber = int.Parse(outputArgs[1]);

                        foreach (var patient in patients
                            .Where(p => p.Department == outputArgs[0]))
                        {
                            departmentPatients.Add(patient);
                        }

                        var result = new List<Patient>();
                        for (int i = 0; i < departmentPatients.Count; i++)
                        {
                            if (Math.Ceiling((i + 1) /3.0) == roomNumber)
                            {
                                var patient = departmentPatients[i];
                                result.Add(patient);
                            }
                        }

                        foreach (var patient in result.OrderBy(p => p.Name))
                        {
                            Print(patient);
                        }
                    }
                }

                else
                {
                    foreach (var patient in patients
                        .Where(p => p.Doctor == output.TrimEnd())
                        .OrderBy(p => p.Name))
                    {
                        Print(patient);
                    }
                }
            }
        }

        private static void Print (Patient patient)
        {
            Console.WriteLine(patient.Name);
        }
    }

    public class Patient
    {
        public Patient(string department, string doctor, string name)
        {
            this.Department = department;
            this.Doctor = doctor;
            this.Name = name;
        }

        public string Department { get; set; }
        public string Doctor { get; set; }
        public string Name { get; set; }
    }
}