Volume 21

Online Judge

Problem Set

Authors

Online Contests

User

Web Board
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F.A.Qs
Statistical Charts

Current Contest
Past Contests
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Award Contest

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ID	Title	Ratio(AC/submit)	Date
3000	Frogger	28%(336/1186)	2024-12-12
3001	Gallup	46%(276/589)	2024-12-3
3002	Jackpot	33%(1543/4647)	2025-5-5
3003	Spiderman’s workout	38%(763/1979)	2025-5-5
3004	Subway planning	28%(430/1527)	2025-5-5
3005	Exploding CPU	42%(232/544)	2024-11-29
3006	Dirichlet's Theorem on Arithmetic Progressions	48%(11574/23688)	2025-5-5
3007	Organize Your Train part II	28%(2708/9654)	2025-5-6
3008	Hexerpents of Hexwamp	30%(102/334)	2024-6-30
3009	Curling 2.0	40%(17576/42991)	2025-5-14
3010	The Genome Database of All Space Life	29%(258/875)	2024-7-13
3011	Secrets in Shadows	22%(87/395)	2021-11-7
3012	A Number from Yanghui Triangle	41%(999/2409)	2025-5-5
3013	Big Christmas Tree	21%(6614/30867)	2025-5-5
3014	Cake Pieces and Plates	31%(2202/6928)	2025-5-6
3015	Expected Difference	26%(396/1499)	2025-5-6
3016	K-Monotonic	34%(513/1473)	2025-5-6
3017	Cut the Sequence	30%(4848/15959)	2025-5-6
3018	Giftbox	28%(1144/4048)	2025-5-6
3019	Image Rotation	29%(38/128)	2020-7-30
3020	Antenna Placement	48%(6630/13678)	2025-3-30
3021	e-Coins	48%(431/886)	2025-5-6
3022	The Uxuhul Voting System	45%(177/390)	2024-12-28
3023	Submarines	42%(173/409)	2024-9-24
3024	The Gossiping System	36%(136/374)	2024-11-10
3025	Rings	34%(406/1172)	2024-8-14
3026	Borg Maze	31%(7853/25298)	2025-5-15
3027	Base equality	60%(556/920)	2025-5-6
3028	Shoot-out	29%(316/1067)	2025-2-2
3029	Tour Guide	36%(341/947)	2025-2-2
3030	Nasty Hacks	69%(10035/14525)	2025-5-12
3031	Jezzball	35%(40/114)	2025-2-2
3032	Card Trick	68%(3542/5205)	2025-5-14
3033	Traveling Salesman	37%(171/455)	2025-2-2
3034	Whac-a-Mole	29%(1298/4365)	2025-5-11
3035	Random Walking	31%(278/885)	2025-2-2
3036	Honeycomb Walk	66%(1787/2681)	2025-4-30
3037	Skiing	25%(1831/7203)	2025-4-28
3038	Flying Right	33%(822/2427)	2025-2-5
3039	Close Encounter	36%(1340/3625)	2025-1-20
3040	Allowance	42%(5208/12302)	2025-3-2
3041	Asteroids	53%(18260/34427)	2025-5-15
3042	Grazing on the Run	40%(1217/2971)	2025-5-11
3043	Walk the Talk	41%(269/648)	2022-9-3
3044	City Skyline	43%(1695/3859)	2025-5-6
3045	Cow Acrobats	36%(4076/11240)	2025-5-6
3046	Ant Counting	37%(4454/11978)	2025-5-6
3047	Bovine Birthday	44%(1107/2509)	2024-11-11
3048	Max Factor	36%(3829/10491)	2025-5-13
3049	Securing the Barn	63%(1524/2416)	2025-5-10
3050	Hopscotch	62%(6073/9705)	2025-4-28
3051	Satellite Photographs	45%(3056/6664)	2025-4-27
3052	Geodes	30%(48/158)	2024-9-27
3053	Bowling	26%(242/924)	2024-11-23
3054	High Spies	26%(37/140)	2020-9-9
3055	Digital Friends	46%(546/1182)	2022-6-12
3056	The Bavarian Beer Party	37%(485/1280)	2024-11-2
3057	Evacuation	25%(1560/6019)	2024-7-31
3058	Decompression	48%(293/610)	2024-7-13
3059	Rummikub	35%(78/222)	2024-7-15
3060	Make it Manhattan	40%(475/1178)	2024-8-12
3061	Subsequence	38%(23156/60871)	2025-5-15
3062	Celebrity jeopardy	55%(9793/17491)	2025-5-8
3063	Sherlock Holmes	29%(257/885)	2025-1-21
3064	Payment System	36%(69/188)	2025-4-18
3065	Stargates	22%(554/2454)	2024-8-10
3066	Maximum	57%(546/945)	2024-9-21
3067	Japan	26%(11063/41778)	2025-5-15
3068	"Shortest" pair of paths	49%(1110/2236)	2025-5-7
3069	Saruman's Army	48%(14389/29445)	2025-5-9
3070	Fibonacci	64%(21982/34097)	2025-5-15
3071	Football	42%(4646/10954)	2025-5-8
3072	Robot	33%(612/1810)	2024-5-31
3073	Spam	56%(623/1110)	2024-7-15
3074	Sudoku	34%(5157/14842)	2025-5-11
3075	Tic-Tac-Toe	40%(918/2277)	2024-7-21
3076	Sudoku	45%(3089/6751)	2025-3-9
3077	Rounders	64%(5319/8256)	2024-11-5
3078	Q	68%(1278/1868)	2024-3-27
3079	Enigmatologically Cruciverbalistic	19%(125/656)	2024-6-14
3080	Blue Jeans	43%(12135/27668)	2025-4-29
3081	Core Wars	31%(68/219)	2024-4-2
3082	'Roid Rage	30%(299/977)	2024-7-15
3083	Children of the Candy Corn	42%(7862/18650)	2025-4-17
3084	Panic Room	51%(1224/2359)	2025-5-11
3085	Quick Change	70%(4564/6470)	2025-3-15
3086	Triangular Sums	69%(5678/8123)	2025-5-4
3087	Shuffle'm Up	44%(11613/25981)	2025-5-6
3088	Push Botton Lock	62%(1060/1685)	2024-8-1
3089	Sign Message Formatting	19%(22/112)	2025-4-23
3090	Visible Lattice Points	58%(7389/12640)	2025-5-9
3091	Triangular N-Queens Problem	43%(396/908)	2024-8-11
3092	Non-divisible 2-3 Power Sums	46%(524/1123)	2024-3-26
3093	Margaritas on the River Walk	37%(1262/3328)	2025-4-16
3094	Quicksum	66%(14419/21733)	2025-3-17
3095	Linear Pachinko	69%(1194/1707)	2025-2-21
3096	Surprising Strings	59%(5741/9725)	2025-2-21
3097	Falling Ice	26%(109/415)	2025-2-21
3098	Frugal Search	46%(493/1071)	2025-2-21
3099	Go Go Gorelians	57%(547/958)	2025-5-11

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