Problems #2020 高階競技程式設計 - Contest #1

# Name AC Ratio(user) AC (submission)
18 87.2% (41/47) 39.4% (93/236)
19 70.0% (35/50) 18.8% (54/288)
20 91.8% (45/49) 33.8% (78/231)
21 100.0% (28/28) 66.2% (51/77)
22 86.0% (37/43) 56.5% (78/138)