Java_Arraylist.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Java_Arraylist {

 public static void main(String[] args) {
 /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
 Scanner scan=new Scanner(System.in);

 int total=scan.nextInt();

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

 for(int i=0;i<total;i++)
 {
 int size=scan.nextInt();
 ArrayList<Integer> list=new ArrayList();

 for(int j=0;j<size;j++)
 {
 int item=scan.nextInt();
 list.add(item);
 }
 mainlist.add(list);
 }

 int totalprint=scan.nextInt();
 for(int k=0;k<totalprint;k++)
 {
 int row=scan.nextInt();
 int col=scan.nextInt();
 try
 {
 System.out.println(mainlist.get(row-1).get(col-1));
 }
 catch(Exception e)
 {
 System.out.println("ERROR!");
 }
 }
 scan.close();
 }
}