Problems #2018-TOI-pre

# Name
TopCoder AC Ratio (user) AC (submission)
2051 89.3% (208/233) 40.2% (307/763)
2052 71.0% (132/186) 26.6% (204/766)
2053 89.4% (305/341) 59.9% (473/789)
2054 85.0% (175/206) 37.1% (254/685)
2055 96.2% (251/261) 73.0% (514/704)