Trong ví dụ về rô bốt , nếu thay đổi thứ tự của lệnh 1 và lệnh 2 trong chương trình, rô bốt có thực hiện được công việc nhặt rác không? Hãy xác định vị trí mới của rô bốt sau khi thực hiện xong chương trình với thay đổi trên. Em hãy bổ sung 2 lệnh để đưa rô bốt trở lại vị trí ban đầu.

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