Problems #2008-TOI-pre

# Name
TopCoder AC Ratio (user) AC (submission)
1506 93.9% (170/181) 35.3% (235/666)
1507 92.0% (80/87) 50.9% (108/212)
1508 98.4% (180/183) 54.6% (330/604)
1509 92.1% (140/152) 37.2% (386/1037)
1510 83.3% (40/48) 17.7% (55/311)