了解です。文がおかしかったらすみません。
I have been studying for three days in Cram school. It was from morning to night. I was glad to solve the problem.So it was good time for me. I want to study a lot from now on and be able to solve problems I'm not good at.
最後の文は難しかったので翻訳を使わせてもらいました。大体言いたいことは伝わると思います。
頑張れ!