#누적 합 prefix_sum

#	제목	푼 사람 수	평균 시도
19156	Cleaning Robots	9	2.11
18995	Postcards	1	2.00
18986	Turn Off The Light	2	2.00
18944	Non-Decreasing Subarray Game	48	3.92
18885	New Year and Ascent Sequence	64	1.69
18866	젊은 날의 생이여	154	4.34
18830	하이퍼 수열과 하이퍼 쿼리	58	5.12
18800	도로 공사	15	6.87
18784	Triangles (Silver)	137	2.55
18781	Help Yourself (Gold)	100	1.94
18778	Equilateral Triangles	32	2.22
18752	Kilk	16	2.31
18747	Flip	22	2.14
18707	Dull Chocolates	7	1.14
18704	Awesome Shawarma	12	1.58
18651	Linear Congruential Generator	7	4.86
18628	Jigglypuff	24	2.04
18589	Radar Scanner	18	1.22
18579	K-Triangles	4	1.00
18499	Not Our Problem	6	2.50
18431	Just Long Neckties	77	1.61
18425	Putovanje	36	1.86
18372	트리와 쿼리 14	30	3.30
18368	Trous de loup	27	2.96
18345	순례자의 기억과 감명받은 신	12	2.67
18335	Lets Burn and Rob Manhootan	2	2.00
18317	Farmer John Solves 3SUM	141	3.57
18314	Non-Decreasing Subsequences	54	3.61
18264	Moortal Cowmbat	86	2.10
18246	색종이와 쿼리	112	3.25
18218	One-Way Conveyors	28	4.43
18215	Halting Problem	19	1.89
18202	Dance Circle	5	1.40
18190	촛불과 그림자	14	13.29
18120	대농부 김상혁	167	2.83
18080	Average Rank	36	1.50
18074	High Load Database	22	1.45
18047	Fantastic compression	17	4.18
18016	더 어려운 계단 수	3	1.67
18002	Balanced Animals	27	1.30
17996	Interstellar Travel	9	1.33
17981	Bus Ticket	8	6.63
17888	#exclude<scoring>	1	2.00
17882	Tired Terry	22	1.68
17860	Square Rooms	12	1.08
17749	Cake	16	2.38
17736	JOIOJI	42	1.33
17719	IOIOI Cards	23	2.43
17717	En-JOI-able Logo Design	38	1.76
17709	Toilets	39	1.41

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