Help me in solving CNTSORT problem

help
,
1

My issue

please help me with the error

Exception in thread “main” java.util.NoSuchElementException
at java.base/java.util.Scanner.throwFor(Scanner.java:937)
at java.base/java.util.Scanner.next(Scanner.java:1594)
at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
at Codechef.main(Main.java:12)

My code

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
   Scanner sc = new Scanner(System.in);

        int ntc = sc.nextInt();

        StringBuilder str = new StringBuilder();

        while(ntc -- > 0) {

            int N = sc.nextInt();

            int arr [] = new int[N];

            for(int i =0; i<N; i++) {
                arr[i] = sc.nextInt();
            }

            int [] freq = new int[101];

            for(int i = 0; i<N; i++) {
                freq[arr[i]]++;
            }

            for(int i = 1; i<freq.length; i++) {

                int cnt = freq[i];

                while(cnt -- > 0) {
                    str.append(i).append(" ");
                }
            }

            str.append("\n");
        }

        System.out.println(str.toString());
	}
}

Learning course: Jump from 2* to 3*
Problem Link: Counting Sort Practice Problem in Jump from 2* to 3* - CodeChef