Dynamic-Programming:戻すDP

#	ID	Name	Difficulty	Solver
1	abc321_f	F. #(subset sum = K) with Add and Erase	1645	4556
2	arc104_d	D. Multiset Mean	2251	1679
3	arc102_c	E. Stop. Otherwise...	2484	1305
4	arc028_4	D. 注文の多い高橋商店	2997	401
5	dp_d	D. Knapsack 1	null	50438