class Course {

string courseId;

string courseName;

int credit;

List requiredSubjects;

List teachers;

}

class Teacher {

string teacherId;

string teacherName;

List courses;

}

class Classroom {

string classroomId;

int capacity;

bool isAvailable;

}

public void ScheduleCourses(List courses, List teachers, List classrooms) {

foreach (var course in courses) {

var availableTeachers = teachers.Where(t => t.courses.Contains(course)).ToList();

var availableClassrooms = classrooms.Where(c => c.capacity >= course.students && c.isAvailable).ToList();

if (availableTeachers.Count > 0 && availableClassrooms.Count > 0) {

// Assign the first available teacher and classroom to the course

var teacher = availableTeachers.First();

var classroom = availableClassrooms.First();

// Schedule the course

course.teacher = teacher;

course.classroom = classroom;

classroom.isAvailable = false;

}

}

}