10919 Prerequisites?

import java.util.ArrayList;
import java.util.Scanner;

class Another {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        while (scanner.hasNext()) {
            int takenCourses = scanner.nextInt();
            if (takenCourses == 0) break;
            int categories = scanner.nextInt();
            ArrayList<String> takenCoursesList = new ArrayList<>();
            int flag = 1;
            scanner.nextLine();
            for (int i =0 ;i< takenCourses;i++) {
                takenCoursesList.add(scanner.next());
            }
            scanner.nextLine();
            while (categories-- > 0) {
                int total = scanner.nextInt();
                int needToTake = scanner.nextInt();
                int count = 0;

                for (int i =0 ;i< total;i++) {
                    if (takenCoursesList.contains(scanner.next())) count++;
                }
                if (count < needToTake) flag = 0;
                scanner.nextLine();
            }
            if (flag == 0) System.out.println("no");
            else System.out.println("yes");
        }

    }
}