Why my code doesn't work? public class Solution { public static void main(String[] args) throws Exception { //write your code here BufferedReader re = new BufferedReader(new InputStreamReader(System.in)); int[] num0 = new int[20]; for(int i=0;i<num0.length;i++) { String s = re.readLine(); num0[i] = Integer.parseInt(s); } int[] num1 = new int[10]; int[] num2 = new int[10]; for (int m = 0; m < num0.length/2; m++) num1[m] = num0[m]; for (int r = num0.length/2; r < num0.length; r++) { num2[r] = num0[r]; System.out.println(num2[r]); } } }