Team Train Recorder 2.0

• Bubble Cup 12 - Finals Online Mirror, unrated, Div. 1 2019/10/4, solved 4/9, upsolved 🐶/9
• 2019-2020 ACM-ICPC Brazil Subregional Programming Contest 2019/10/3, solved 11/13, upsolved 🐶/13
• PKU Campus 2017 2019/10/2 solved 4/11, upsolved 🐶/11
• PKU Campus 2019 2019/10/1 solved 6/11, upsolved 🐶/11