Google Kickstart compiler runtime error but code working in intellij

Question

There are N houses for sale. The i-th house costs Ai dollars to buy. You have a budget of B dollars to spend.

What is the maximum number of houses you can buy? Round A 2020 Allocation.(Google Kickstart) Google Kickstart compiler runtime error but code working in intellij and other compilers also.

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
public class Solution {
    public static void main(String[] args) {
        Scanner obj1 = new Scanner(System.in);
        int testcases = obj1.nextInt();
        for(int testcases1 = 0; testcases1 < testcases;testcases1++){
            System.out.println("Case #"+ testcases1+1 +": "+findHouses());
        }
        obj1.close();
    }
    private static int findHouses(){
        Scanner obj = new Scanner(System.in);
        String z = obj.nextLine();
        String[] z1 = z.split(" ");
        int[] intArray = new int[z1.length];
        for (int i = 0; i < z1.length; i++) {
            try {
                intArray[i] = Integer.parseInt(z1[i]);
            } catch (Exception e) {
                System.out.println("Unable to parse string to int: " + e.getMessage());
            }
        }
        ArrayList<Integer> houses = new ArrayList<Integer>();
        for (int j = 0; j < intArray[0]; j++){
            houses.add(obj.nextInt());
        }
        obj.close();
        int sum = 0;
        int f = 0;
        Collections.sort(houses);
        do {
            sum += houses.get(f);
            if (sum <= intArray[1]){
                f++;
            }else {
                break;
            }
        }while (houses.size() > f);
        return f;
    }
}