从参赛手册pdf里搞出来xlsx或者csv格式的队伍名单
git clone https://github.com/xcpcio/domjudge-utility.git
cd domjudge-utility/pdf_parser
pip3 install -U -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple/
python3 extract.py -h
python3 extract.py a.pdf --auto/--pages [--format ALL/csv/xlcx] [--output ./output]