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Query on a tree again! statistics & best solutions

Users accepted	Submissions	Accepted	Wrong Answer	Compile Error	Runtime Error	Time Limit Exceeded
2241	10691	9311	0	480	0	0

RANK	DATE	USER	RESULT	TIME	MEM	LANG
141	2012-11-26 07:39:13	74	100	1.37	12M	C++ 4.3.2
142	2012-12-01 05:48:00	Mahmoud Radwan Mohamed	100	1.37	9.9M	C++ 4.3.2
143	2012-12-02 20:37:09	Ahmed Thabet	100	1.37	12M	C++ 4.3.2
144	2012-12-03 12:40:50	Dauren	100	1.29	11M	C++ 4.3.2
145	2012-12-11 09:19:25	volzkzg	100	1.37	7.9M	C++ 4.3.2
146	2012-12-11 09:36:47	高必成	100	0.74	8.2M	C++ 4.3.2
147	2012-12-17 15:06:18	Giorgos Christoglou	100	1.37	14M	C++ 4.3.2
148	2012-12-26 21:48:43	Mateusz Puczel	100	0.37	12M	C++ 4.3.2
149	2012-12-30 05:51:34	Danh Nguyen	100	1.51	12M	C++ 4.3.2
150	2012-12-30 16:45:08	Zhijian Liu	100	1.08	17M	C++ 4.3.2
151	2013-01-14 12:17:08	Jingyi Xu	100	1.38	7.9M	C++ 4.3.2
152	2013-01-15 00:58:46	Jinkun Lin	100	1.37	7.0M	C++ 4.3.2
153	2013-01-15 01:46:17	Lequn Chen	100	1.88	4.5M	C++ 4.3.2
154	2013-01-15 02:18:01	g·world	100	1.37	7.0M	C++ 4.3.2
155	2013-01-17 14:36:15	YiyinZhang	100	1.29	8.2M	C++ 4.3.2
156	2013-01-18 03:38:27	FLanS39	100	1.29	9.1M	C++ 4.3.2
157	2013-02-08 15:35:54	Boyang Deng	100	0.89	69M	C++ 4.3.2
158	2013-02-09 22:39:54	Marin Tomic	100	1.36	11M	C++ 4.3.2
159	2013-02-14 16:12:01	Chiang sheng wen	100	1.29	13M	C++ 4.3.2
160	2013-02-15 13:30:51	Li Zhuohan	100	1.29	7.2M	C++ 4.3.2