If it is permitted to discuss problems now, how to solve A? I think B and C are more or less straightforward.↵
↵
[plants](https://drive.google.com/file/d/1n9iRhZRGEsIyYgqhp-BCRmypsXWGrSeA/view?usp=drivesdk)↵
[supertrees](https://drive.google.com/file/d/1rCmHYuRWBGrRg5QOcEUs-TrTxVi5QIzs/view?usp=drivesdk)↵
[tickets](https://drive.google.com/file/d/1bh5C8HVYdL-OggQWMOKlE2X7FUeNDXrR/view?usp=drivesdk)
↵
[plants](https://drive.google.com/file/d/1n9iRhZRGEsIyYgqhp-BCRmypsXWGrSeA/view?usp=drivesdk)↵
[supertrees](https://drive.google.com/file/d/1rCmHYuRWBGrRg5QOcEUs-TrTxVi5QIzs/view?usp=drivesdk)↵
[tickets](https://drive.google.com/file/d/1bh5C8HVYdL-OggQWMOKlE2X7FUeNDXrR/view?usp=drivesdk)