package HackerRank; import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class FiftyNine { 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 sc = new Scanner(System.in); // Read number of lines int n = sc.nextInt(); sc.nextLine(); // Consume the newline after reading the integer // Initialize an ArrayList to hold the lines of numbers ArrayList> lines = new ArrayList<>(); // Read each line for (int i = 0; i < n; i++) { // Read the number of integers in the line and the integers themselves String[] input = sc.nextLine().split(" "); ArrayList line = new ArrayList<>(); for (int j = 1; j < input.length; j++) { // Skip the first number (count) line.add(Integer.parseInt(input[j])); } lines.add(line); } // Read the number of queries int q = sc.nextInt(); // Process each query for (int i = 0; i < q; i++) { int x = sc.nextInt() - 1; // Convert 1-based index to 0-based int y = sc.nextInt() - 1; // Convert 1-based index to 0-based // Check if the indices are valid if (x >= 0 && x < n && y >= 0 && y < lines.get(x).size()) { System.out.println(lines.get(x).get(y)); } else { System.out.println("ERROR!"); } } sc.close(); } }