The official period for "Divide and Conquer" is over. However, you can participate unofficially using this link.
Your timer will start when you click "Start Divide and Conquer" — then you will have 150 minutes to solve and submit your answers.
A timer will be shown the answer page with the remaining time.
If you have any questions or doubts or suggestions, please ask in the forum.
New users must register here (free) to be able to participate.