Problems #2021-CKsim

# Name
TopCoder AC Ratio (user) AC (submission)
2205 82.0% (50/61) 42.0% (81/193)
2214 57.5% (23/40) 28.8% (32/111)
2215 75.0% (39/52) 43.6% (72/165)
2216 47.8% (11/23) 18.3% (22/120)
2217 38.5% (10/26) 25.0% (20/80)