Solved by undefined_is_falsy

#	Title	# Solved	Avg. Tries
10814	나이순 정렬	58,947	2.27
10813	공 바꾸기	49,449	1.58
10811	바구니 뒤집기	43,482	1.90
10810	공 넣기	50,656	1.92
10809	알파벳 찾기	112,876	1.87
10808	알파벳 개수 STANDARD	33,039	1.47
10807	개수 세기 STANDARD	85,557	1.62
10799	쇠막대기	28,793	1.53
10798	세로읽기	39,851	2.09
10775	Gates	7,012	2.79
10773	Zero That Out	62,012	1.46
10709	기상캐스터	4,861	1.33
10430	나머지 STANDARD	199,812	1.95
10423	전기가 부족해	2,325	1.44
10250	ACM Hotel	61,433	3.00
10172	Dogs STANDARD	183,396	2.33
10171	Cats STANDARD	187,742	2.79
10101	Triangle Times	26,486	1.77
10026	Cow Art	34,486	1.76
9996	VJEKO	5,818	3.75
9935	EKSPLOZIJA	18,960	3.71
9934	OBILAZAK	5,693	1.45
9663	N-Queen	41,164	2.14
9506	Federation Favorites	26,807	1.97
9498	시험 성적 STANDARD	209,204	1.82
9466	Term Project	13,432	4.12
9465	Stickers	28,444	2.12
9461	Padovan Sequence	43,780	2.30
9375	Incognito	23,030	1.79
9372	Flying Safely	11,883	1.62
9328	Keys	5,161	3.63
9251	LCS	31,111	2.41
9184	Function Run Fun	17,463	2.33
9095	Adding 1s, 2s, and 3s	63,510	1.54
9086	문자열 STANDARD	56,723	1.56
9063	대지	17,150	1.56
9020	Goldbach’s Conjecture	27,955	2.53
9019	DSLR	15,213	4.76
9012	Parenthesis	81,563	2.15
8958	Score	100,808	1.93
8393	Sum STANDARD	170,646	1.56
7795	Eat or Be Eaten	7,359	1.98
7785	Easy work	22,466	2.44
7662	Dual Priority Queue	13,639	4.51
7576	토마토 STANDARD	54,010	2.66
7569	토마토 STANDARD	33,598	2.32
7568	덩치	53,159	1.78
7562	Knight Moves STANDARD	27,945	1.89
6603	Lotto	26,646	1.80
6593	Dungeon Master	7,941	2.54

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