Untitled

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

public class NumbersArrayList {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
       // System.out.print("Enter total number of lines:");
        int lines = scanner.nextInt();

        ArrayList<ArrayList<Integer>> rows = new ArrayList<>();

        for (int i = 0; i < lines; i++) {
            //System.out.print("Enter the number of elements for line " + (i + 1) + ":");
            int numElements = scanner.nextInt();

            //if(numElements!=0) {
                ArrayList<Integer> row = new ArrayList<>();
               // System.out.print("Enter the elements for line " + (i + 1) + ":");
                for (int j = 0; j < numElements; j++) {
                    int element = scanner.nextInt();
                    row.add(element);
                }
                //  System.out.println(row);
                rows.add(row);
            //}
        }
        System.out.println(rows);

       // System.out.print("Enter the no of queries:");
        int queryCount = scanner.nextInt();
        for (int m = 1; m <= queryCount; m++) {
        //    System.out.print("Enter the line to be fetched:");
            int queryLine = scanner.nextInt();
         //   System.out.print("Enter the position to be fetched:");
            int queryPosition = scanner.nextInt();
          //  System.out.println("line size:"+rows.get(queryLine-1).size());

            if (queryPosition-1 < rows.get(queryLine-1).size()) {
                System.out.println(rows.get(queryLine-1).get(queryPosition-1));
            } else {
                System.out.println("ERROR!");
            }
        }
    }
}