Data-Structure:WaveletMatrix

#	ID	Name	Difficulty	Solver
1	abc234_d	D. Prefix K-th Max	503	8734
2	abc239_e	E. Subtree K-th Max	1084	5006
3	abc281_e	E. Least Elements	1334	3866
4	abc231_f	F. Jealous Two	1580	2501
5	abc339_g	G. Smaller Sum	1792	1732