「SPOJ 839」OPTM - Optimal Marks

12-06

「SPOJ 375」QTREE - Query on a tree

12-04

「SPOJ 6779」GSS7 - Can you answer these queries VII

12-02

「SPOJ 4168」SQFREE - Square-free integers

11-17

「SPOJ 1716」GSS3 - Can you answer these queries III

10-01

「SPOJ 5971」LCMSUM

08-17