Solved by koosaga

#	Title	# Solved	Avg. Tries
31286	철도 2	50	3.98
31298	Removing Vertices	9	1.33
31311	Very Important Edge	15	2.27
31316	Books	5	1.00
31346	Candies	8	2.38
31347	Chessboard Game	10	2.10
31348	Geometric Progression	25	3.64
31350	IQ Test	5	2.40
31352	Random Spanning Tree	4	1.75
31353	Tree Embedding	6	4.50
31355	XOr	24	1.46
31357	Dispersed parentheses	6	1.67
31359	LWDB	2	2.00
31362	Nano alarm-clocks	10	1.60
31367	The Pool for Lucky Ones	4	2.00
31377	Child's Game with Robot	21	4.67
31381	Potential well	6	7.17
31393	Urban geography	4	1.50
31398	Gas Station	50	2.30
31440	Largest Rectangle in a Histogram and Queries 2	23	3.74
31442	Good Sequence	14	5.71
31550	Merging Cells	5	1.00
31551	Mooball Teams III	6	4.17
31570	섬	25	3.32
31571	점프 게임	12	2.50
31572	팰린드롬 판별하기	52	4.23
31573	바이러스	24	2.71
31590	Candy Compress	37	1.84
31593	Antiparticle Antiphysics	3	1.67
31594	Attraction Score	18	3.89
31595	Bit Counting Sequence	51	2.35
31596	Bánh Bò	8	1.50
31597	Duplicates	35	2.17
31598	Forming Groups	32	2.38
31599	Personality Test	28	1.29
31600	Pho Restaurant	39	1.67
31601	Symmetric Boundary	9	1.56
31602	There and Back Again	35	1.80
31603	Tree Quiz	29	1.52
31604	XOR Operations	22	2.45
31605	Zig-zag	3	1.00
31622	高速道路の通行料金 (Highway Tolls)	8	2.00
31623	Room Temperature	39	1.56
31624	Construction Project 2	30	1.67
31625	Marathon Race 2	15	3.07
31626	Gift Exchange	20	3.35
31627	Road Service 2	3	4.00
31648	Palindrome Game	104	1.70
31650	Maximizing Productivity	75	2.00
31651	Lazy Cow	10	2.00

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