Kyselyt

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int num = Integer.parseInt(input.nextLine());
        int[] kyselyt = new int[num];
        int biggest = 0;

        for (int i = 0; i < num; i++) {
            kyselyt[i] = Integer.parseInt(input.nextLine());
            if (kyselyt[i] > biggest) {
                biggest = kyselyt[i];
            }
        }

        String numbers = "";
        int last = 1;

        while (numbers.length() < biggest) {
            numbers += last;
            //System.out.println(numbers);
            last++;
        }

        for (int kysely : kyselyt) {
            System.out.println(numbers.charAt(kysely - 1));
        }
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 3

Group: 3

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.NumberFormatException: For input string: "67227483294...