Problems

Problem	Category	Points	AC %	Users
PRE_BOARD	Practice	20	28.6%	2
PREBSTR	Practice	40	20.0%	1
PREBUILDTREE	Practice	25	26.7%	2
PRECAVE	Practice	40	50.0%	2
PRECHAMELEON	Practice	50	0.0%	0
PRECNTPATH2	Practice	25	0.0%	0
PRECOLDWAR	Practice	50	10.5%	3
PRECOMCAT	Practice	50	0.0%	0
PREDANHCO	Practice	80	12.5%	1
PREDIV	Practice	42	20.0%	6
PREDOLL	Practice	48	7.9%	5
PREDTREE	Practice	25	4.3%	2
PREEXERCISE	Practice	80	30.0%	3
PREFIX1	Trie	100	43.3%	21
PREFROG	Practice	40	7.7%	1
PREGCDIX	Practice	50	10.0%	1
PREGCDLCM	Practice	35	9.5%	7
PREGRFLRS	Practice	50	0.0%	0
PRELQUERY	Practice	25	27.6%	1
PREMAGIC	Practice	60	4.2%	3
PRE_MINE	Practice	20	21.9%	18
PREMONEY	Practice	70	1.5%	1
PREMSEQ	Practice	40	31.4%	19
PRE_NETWORK	Practice	20	83.3%	7
PREOPERATION	Practice	81	13.3%	4
PREORDER	Practice	42	1.3%	2
PREPAINT	Practice	50	13.3%	2
PREPER	Practice	40	12.5%	2
PREPHOTO	Practice	20	28.6%	1
PREPIC	Practice	40	8.3%	1
PRE_PERIOD	Practice	20	23.5%	19
PRERECS	Practice	5	11.1%	3
PRESENT	SOHOC	100	19.7%	11
PRESHLGOOD	Practice	50	18.2%	1
PRESOUTH	Practice	52	24.1%	7
PRESTRING	Practice	40	23.1%	3
PRESWAP	Practice	40	30.8%	23
PRE_TRAVEL	Practice	35	9.5%	2
PRETREE	Practice	60	0.0%	0
PRETRIPLE	Practice	42	5.6%	5
PREWORD	Practice	28	20.0%	6
PRINTER	Trie	100	65.0%	24
PRIZES	Practice	100	39.6%	31
PROAR	SOHOC	11	12.9%	7
PROBE	BFS	29	19.3%	11
PRODUCT	CƠ BẢN	100	67.4%	82
PROSEQ	SOHOC	20	30.3%	25
PSEPRIME	SOHOC	100	17.5%	9
PSEQ1	SOHOC	10	12.3%	35
PTC	Practice	100	37.4%	27