sfd

class Summer extends Thread {
    int begin;
    int end;
    int[] sharedBuffer;
    int sum = 0;

    Summer(int begin, int end, int[] sharedBuffer) {
        this.begin = begin;
        this.end = end;
        this.sharedBuffer = sharedBuffer;
    }

    @Override
    public void run() {
        for (int i = begin; i < end; i++) {
            sum += sharedBuffer[i];
        }
    }

    int getSum() {
        return sum;
    }
}

public class Main {

    public static void main(String[] args) {

        System.out.println("Hello World!");
        int[] numbers = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

        Summer thread1 = new Summer(0, 5, numbers);
        Summer thread2 = new Summer(5, 10, numbers);

        thread1.start();
        thread2.start();

        try {
            thread1.join();
            thread2.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        int sum = thread1.getSum() + thread2.getSum();
        System.out.println(sum);

    }
}