Problem Set - Hydro

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	2	2 【测试】A	0 / 4	10
	3	3 【测试】B	0 / 0	(None)
	4	4 【测试】C	0 / 0	(None)
	5	5 【测试】D	0 / 0	(None)
	6	6 【测试】E	0 / 0	(None)
	7	7 【测试】F	0 / 0	(None)
	8	8 helloworldtest	1 / 1	10
	1	P1000 A+B Problem 系统测试	0 / 1	10

Pick a problem randomly based on the current filter.