Problem Set - Hydro

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	2	PY0001 你好世界入门	4 / 13	1
	3	PY0002 复读机入门	3 / 5	1
	4	PY0003 A+B 问题入门	3 / 18	1
	5	PY0004 计算 BMI 入门	1 / 6	1
	6	PY0005 健康等级入门	0 / 3	2
	7	PY0006 三数最大值入门	0 / 0	2
	8	PY0007 数数入门	0 / 0	2
	9	PY0008 计数入门	0 / 0	2
	10	PY0009 统计偶数个数入门	0 / 0	3

Pick a problem randomly based on the current filter.