Problems #2021-CKsim

# Name
TopCoder AC Ratio (user) AC (submission)
2205 80.7% (46/57) 41.4% (77/186)
2214 62.2% (23/37) 30.5% (32/105)
2215 78.3% (36/46) 43.1% (62/144)
2216 55.0% (11/20) 20.6% (22/107)
2217 40.0% (8/20) 20.8% (10/48)