Data-Structure:WaveletMatrix

#	ID	Name	Difficulty	Solver
1	abc234_d	G. Prefix K-th Max	503	10799
2	abc239_e	H. Subtree K-th Max	1084	6090
3	abc281_e	H. Least Elements	1334	4850
4	abc231_f	I. Jealous Two	1580	3203
5	abc339_g	G. Smaller Sum	1792	2813