Solved by pretty_pi

#	Title	# Solved	Avg. Tries
5528	달려라 IOI 열차	135	3.59
5529	저택	140	5.34
5530	JOIOI 탑	224	2.48
5541	釘 (Nails)	133	2.07
5542	JOI 국가의 행사	380	2.07
5550	헌책방	157	1.76
5551	쇼핑몰	147	2.45
5552	걷는 산타클로스	74	4.19
5557	1학년	7,973	2.11
5559	JOI 깃발	74	3.26
5572	사다리 게임	55	1.80
5573	산책	895	2.08
5577	RBY팡!	247	3.23
5580	빙고 게임	63	2.21
5582	공통 부분 문자열	6,799	2.35
5585	거스름돈	27,314	1.52
5597	Who have not handed in ?	66,318	1.94
5615	아파트 임대 STANDARD	1,382	5.00
5618	공약수	3,914	1.99
5620	가장 가까운 두 점의 거리	725	2.31
5622	BAKA	76,343	1.71
5624	DOBRI	767	2.88
5626	JEDAN	634	3.50
5639	Binary Search Tree	14,217	2.62
5676	Interval Product STANDARD	2,541	3.02
5719	Almost Shortest Path	3,823	5.10
5735	Emoticons :-)	148	3.55
5820	경주	610	4.73
5884	Three Lines	180	2.19
5889	Cows in a Skyscraper	29	3.24
5901	Relocation	122	2.52
5904	Moo	2,435	2.83
5916	Grass Planting	418	1.98
5978	Odd degrees	45	2.29
6064	Cain Calendar	15,573	3.68
6086	Total Flow	2,672	3.62
6098	Cruel Math Teacher, II	35	3.00
6171	Land Acquisition	604	3.17
6213	Balanced Lineup	509	1.23
6297	Intervals	27	2.33
6515	Frequent values	368	3.67
6549	Largest Rectangle in a Histogram	11,083	3.63
6672	Electricity	108	2.88
6790	Spies Like Us	12	1.75
6840	Who is in the middle?	4,652	1.33
6989	채점	262	3.65
7040	Layout	106	2.53
7287	Registration STANDARD	62,031	1.92
7453	4 Values whose Sum is 0	6,751	4.38
7469	K-th Number	1,833	3.07

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