// Author: Rodney Shaghoulian // Github: github.com/RodneyShag // HackerRank: hackerrank.com/RodneyShag import java.util.Scanner; import java.util.ArrayList; public class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int n = scan.nextInt(); /* Save numbers in 2-D ArrayList */ ArrayList> lists = new ArrayList<>(); for (int row = 0; row < n; row++) { int d = scan.nextInt(); ArrayList list = new ArrayList<>(); for (int col = 0; col < d; col++) { list.add(scan.nextInt()); } lists.add(list); } /* Answer the queries */ int q = scan.nextInt(); for (int i = 0; i < q; i++) { int x = scan.nextInt(); int y = scan.nextInt(); ArrayList list = lists.get(x-1); if (y <= list.size()) { System.out.println(list.get(y-1)); } else { System.out.println("ERROR!"); } } scan.close(); } }