Why is this code giving wrong answer? I used two queues and proceeded with the same algorithm given in the editorial. Plz help.

import java.util.*;
class COOK82C {
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
 
		Queue<Integer> q1 = new LinkedList<>();
		Queue<Integer> q2 = new LinkedList<>();
 
		for(int i = 0; i < n; i++) {
			int a = sc.nextInt();
			q1.add(a);
		}
		int dd[] = new int[m];
		for(int i = 0; i < m; i++) {
			int x = sc.nextInt();
			dd[i] = x;
		}