Problems #2018-TOI-pre

# Name
TopCoder AC Ratio (user) AC (submission)
2051 89.3% (209/234) 40.3% (308/764)
2052 71.3% (134/188) 26.6% (206/773)
2053 89.5% (306/342) 60.0% (474/790)
2054 85.0% (176/207) 37.2% (255/686)
2055 96.2% (251/261) 73.0% (514/704)