Problems #2009-北市賽

# Name
TopCoder AC Ratio (user) AC (submission)
1677 93.7% (59/63) 48.1% (75/156)
1678 78.3% (18/23) 22.8% (23/101)
1679 98.5% (64/65) 78.5% (73/93)
1680 96.7% (58/60) 54.0% (74/137)
1681 50.0% (6/12) 45.5% (25/55)