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import java.util.HashSet; import java.util.Scanner; public class Main{ public static void main(String[] args) { Scanner scanner = new Scanner(System.in); // Read number of existing gym members System.out.print("Number of existing gym members: "); int n = scanner.nextInt(); // Read number of members signed up for the special class System.out.print("Number of members signed up for the special class: "); int m = scanner.nextInt(); // HashSet to store existing gym members HashSet<Integer> gymMembers = new HashSet<>(); System.out.println("Enter existing gym member IDs:"); for (int i = 0; i < n; i++) { gymMembers.add(scanner.nextInt()); } System.out.println("Enter special class member IDs:"); boolean isSubset = true; for (int i = 0; i < m; i++) { int member = scanner.nextInt(); if (!gymMembers.contains(member)) { isSubset = false; } } // Output result if (isSubset) { System.out.println("Subset"); } else { System.out.println("Not a subset"); } scanner.close(); } }
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