Problems #2021-TOI-pre

# Name
TopCoder AC Ratio (user) AC (submission)
2193 97.1% (266/274) 51.3% (344/670)
2194 63.1% (70/111) 23.3% (140/601)
2195 70.4% (100/142) 20.0% (180/899)
2196 54.8% (17/31) 19.9% (53/266)
2197 47.8% (22/46) 37.1% (79/213)