初赛试题 - Problem Set

ID	Problem Show tags Hide tags	AC / Tried	Difficulty
635	635 1 分组初赛试题	23 / 48	4
636	636 2 小矮人初赛试题	20 / 62	6
637	637 3 打字初赛试题	8 / 14	8
638	638 4 扑克牌初赛试题	6 / 9	9
639	639 5 房间数量初赛试题	4 / 16	9
640	640 6 中位数初赛试题	3 / 6	10

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