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My Solution is:
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
List<List<Integer>> lines = new ArrayList<>();
for (int i = 0; i < n; i++)
{
int d = scan.nextInt();
List<Integer> line = new ArrayList<>();
for (int j = 0; j < d; j++)
{
line.add(scan.nextInt());
}
lines.add(line);
}
int q = scan.nextInt();
for (int k = 0; k < q; k++) {
int x = scan.nextInt();
int y = scan.nextInt();
try{
System.out.println(lines.get(x-1).get(y-1));
}
catch(Exception e)
{
System.out.println("ERROR!");
}
}
}
}
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Java Arraylist
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My Solution is: Scanner scan = new Scanner(System.in);
}