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| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
| ID | Title | Ratio(AC/submit) | Date |
| 4036 | Cybercrime Donut Investigation | 0%(0/235) | Nov 6, 2025 |
| 4032 | Kingdom Roadmap | 0%(0/287) | Dec 12, 2023 |
| 4029 | Huzita Axiom 6 | 0%(0/54) | Aug 15, 2025 |
| 4027 | Flights | 0%(0/115) | Nov 24, 2024 |
| 4017 | Galaxy Interconnection | 2%(2/86) | Dec 25, 2024 |
| 4015 | Electrification | 1%(2/120) | Dec 25, 2024 |
| 4035 | Coin Collecting | 2%(3/109) | Jul 12, 2019 |
| 4054 | KINA Is Not Abbreviation | 1%(4/269) | Oct 18, 2025 |
| 4024 | Caption | 5%(5/88) | Aug 20, 2019 |
| 4033 | Lanes | 6%(6/92) | Oct 21, 2025 |
| 4053 | World of Goo | 4%(7/148) | Jan 29, 2024 |
| 4013 | Cube Coloring | 4%(12/282) | Dec 25, 2024 |
| 4004 | My World Cup | 17%(16/94) | Oct 19, 2025 |
| 4038 | Game, Set and Match | 31%(19/60) | Mar 28, 2019 |
| 4031 | Journey | 2%(20/916) | Nov 16, 2025 |
| 4009 | Porcelain Exhibitions | 14%(21/148) | Dec 25, 2024 |
| 4034 | Alphabet Soup | 23%(21/91) | Nov 23, 2024 |
| 4021 | Kids Like Cakes | 6%(25/359) | Dec 24, 2024 |
| 4037 | Distributing Ballot Boxes | 10%(34/324) | Nov 25, 2025 |
| 4040 | Non-negative Partial Sums | 10%(41/393) | Jun 4, 2025 |
| 4051 | Aeroplane Chess | 19%(46/237) | Mar 28, 2023 |
| 4041 | Peer Review | 42%(49/116) | Nov 25, 2025 |
| 4010 | Shadow | 27%(50/183) | Oct 17, 2025 |
| 4008 | Running relay | 16%(53/329) | Nov 25, 2025 |
| 4039 | Guess the Numbers | 25%(57/222) | Nov 25, 2025 |
| 4050 | Necklace | 15%(57/366) | Nov 8, 2023 |
| 4042 | Regular Convex Polygon | 34%(57/165) | Dec 24, 2024 |
| 4019 | Immediate Delivery | 34%(64/183) | Dec 24, 2024 |
| 4043 | Remoteland | 26%(71/270) | Dec 24, 2024 |
| 4025 | Dictionary Size | 17%(93/533) | Dec 24, 2024 |
| 4018 | High security | 26%(99/379) | Dec 24, 2024 |
| 4005 | Moles | 13%(105/758) | Aug 21, 2025 |
| 4026 | Eve | 27%(107/390) | Dec 24, 2024 |
| 4028 | GCD Guessing Game | 41%(159/385) | Oct 29, 2025 |
| 4023 | Binary Encoding | 42%(163/382) | Nov 25, 2025 |
| 4006 | Genghis Khan the Conqueror | 31%(170/539) | Oct 20, 2025 |
| 4020 | John's Inversions | 31%(229/729) | Dec 24, 2024 |
| 4049 | Chess | 22%(236/1030) | Dec 24, 2024 |
| 4012 | Black Square | 18%(265/1443) | Dec 24, 2024 |
| 4000 | National Treasures | 25%(270/1064) | Nov 17, 2025 |
| 4003 | Bob’s Race | 27%(289/1051) | Nov 18, 2025 |
| 4007 | Flood-it! | 34%(292/835) | Sep 2, 2025 |
| 4016 | Flat | 39%(319/814) | Dec 24, 2024 |
| 4002 | Alice's mooncake shop | 29%(360/1211) | Nov 25, 2025 |
| 4022 | ASCII Area | 45%(372/811) | Jan 17, 2025 |
| 4048 | Chinese Repeating Crossbow | 29%(415/1405) | Dec 24, 2024 |
| 4014 | Dice | 34%(451/1290) | Dec 24, 2024 |
| 4052 | Hrinity | 26%(602/2311) | May 5, 2025 |
| 4001 | Xiangqi | 23%(648/2793) | Oct 21, 2025 |
| 4044 | Score Sequence | 39%(673/1692) | Nov 25, 2025 |
| 4046 | Sightseeing | 22%(680/3079) | Dec 24, 2024 |
| 4047 | Garden | 37%(682/1835) | Dec 24, 2024 |
| 4045 | Power Station | 40%(717/1768) | Nov 25, 2025 |
| 4011 | Automated Telephone Exchange | 52%(1127/2167) | Oct 17, 2025 |
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