#비트마스킹 bitmask

#	제목	푼 사람 수	평균 시도
12669	The Year of Code Jam (Small)	17	1.12
23377	Cangaroo	42	1.12
20025	Economic One-way Roads	8	1.13
22196	Political Development	8	1.13
28096	도시락 배달	8	1.13
12661	Juice (Small)	30	1.13
18177	Light Emitting Hindenburg	30	1.13
25776	Pseudo Pseudo Random Numbers	30	1.13
12457	ビット数 (Small)	36	1.14
3543	Exclusive Access 2	7	1.14
3658	Tichu	7	1.14
22288	Rainbow Road Race	7	1.14
14156	Binarni	13	1.15
24604	Black and White	19	1.16
6036	The Rock Game	31	1.16
3436	Strange Billboard	6	1.17
15278	Decisions, Decisions	12	1.17
18503	Topological Ordering	12	1.17
31591	Combination Lock	6	1.17
9816	Number of Locks	11	1.18
17748	Spy	22	1.18
18666	AtCoder Quality Problem	16	1.19
4951	And Then, How Many Are There?	5	1.20
12070	gNumbers (Small)	10	1.20
19093	Ones	20	1.20
21497	Укладка плитки	5	1.20
24928	Magical Runes	50	1.20
25754	Computation - Task 10	5	1.20
30932	Chayas	15	1.20
1887	Cow Pizza	82	1.21
10042	部活のスケジュール表 (Schedule)	37	1.22
23099	Pickpockets	9	1.22
14275	직사각형 색칠	31	1.23
19273	XorTree	13	1.23
27602	Italian Data Centers	13	1.23
27960	사격 내기	1,153	1.24
3289	FRIENDS	4	1.25
4496	Pebbles	4	1.25
10346	The Maze Makers	12	1.25
18470	Counting Cactus	8	1.25
22400	ぼくのかんがえたさいきょうのおふとん	4	1.25
22413	真っ暗な部屋	4	1.25
23658	Cubic Path	4	1.25
27360	입자 실험	8	1.25
31469	아몬드 초콜릿	4	1.25
31527	Tournament Matchmaking	4	1.25
5589	おせんべい	41	1.27
21139	Exam Manipulation	52	1.27
11151	Civilization	21	1.29
13103	Idempotent Filter	14	1.29

123456814