Dynamic-Programming:戻すDP

#	ID	Name	Difficulty	Solver
1	abc321_f	I. #(subset sum = K) with Add and Erase	1645	6427
2	arc104_d	D. Multiset Mean	2251	1967
3	arc102_c	E. Stop. Otherwise...	2484	1520
4	arc028_4	D. 注文の多い高橋商店	2997	455
5	dp_d	D. Knapsack 1	null	66244