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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 |
| 3689 | Equations | 9%(148/1559) | Jan 7, 2026 |
| 3677 | Chemical Weighing | 15%(94/611) | May 7, 2026 |
| 3607 | Distribution of Toys | 16%(210/1255) | May 9, 2026 |
| 3676 | Tomorrow Genius 2008 | 16%(18/107) | Dec 3, 2025 |
| 3642 | Carpool | 19%(179/928) | Jun 24, 2026 |
| 3690 | Constellations | 20%(1645/7966) | Aug 8, 2026 |
| 3674 | Super Assassin | 22%(565/2561) | Aug 15, 2026 |
| 3647 | Tournament | 22%(171/767) | Mar 18, 2026 |
| 3651 | Slink | 23%(27/114) | Dec 10, 2025 |
| 3603 | Zen Puzzle Garden | 24%(75/307) | Dec 3, 2025 |
| 3610 | Maclaurin Series of Reciprocals | 24%(64/261) | Dec 3, 2025 |
| 3696 | The Luckiest number | 24%(3147/12759) | Aug 26, 2026 |
| 3617 | Best Cow Line | 24%(16125/65057) | Aug 30, 2026 |
| 3669 | Meteor Shower | 25%(10388/40842) | Aug 11, 2026 |
| 3604 | Professor Ben | 25%(2364/9291) | Aug 7, 2026 |
| 3630 | Phone List | 25%(13826/53302) | Aug 15, 2026 |
| 3645 | Smeech | 26%(718/2756) | Aug 9, 2026 |
| 3657 | Haybale Guessing | 26%(781/2953) | Aug 13, 2026 |
| 3625 | Building Roads | 27%(3921/14513) | Sep 1, 2026 |
| 3675 | Telescope | 27%(1289/4744) | Aug 16, 2026 |
| 3640 | Conformity | 27%(1098/4026) | Aug 8, 2026 |
| 3636 | Nested Dolls | 27%(2538/9197) | Aug 10, 2026 |
| 3608 | Bridge Across Islands | 28%(4228/14791) | Sep 4, 2026 |
| 3643 | Friend or Foe? | 28%(311/1086) | Mar 16, 2026 |
| 3687 | Labeling Balls | 28%(5944/20579) | Aug 5, 2026 |
| 3679 | The Delivery of Control | 29%(74/255) | Dec 10, 2025 |
| 3699 | miniSQL | 29%(749/2515) | Aug 9, 2026 |
| 3648 | Wedding | 30%(4335/14376) | Aug 6, 2026 |
| 3695 | Rectangles | 30%(1318/4365) | Jul 21, 2026 |
| 3681 | Finding the Rectangle | 30%(1038/3422) | Aug 8, 2026 |
| 3693 | Maximum repetition substring | 30%(4503/14842) | Aug 16, 2026 |
| 3601 | Tower of Hanoi | 30%(783/2561) | Aug 9, 2026 |
| 3697 | USTC campus network | 30%(1608/5255) | Aug 8, 2026 |
| 3644 | Gangs | 31%(152/487) | Jan 8, 2026 |
| 3685 | Matrix | 31%(4855/15190) | Aug 26, 2026 |
| 3629 | Card Stacking | 32%(3052/9445) | Aug 6, 2026 |
| 3682 | King Arthur's Birthday Celebration | 32%(1519/4620) | Aug 8, 2026 |
| 3634 | Circle of Debt | 33%(114/345) | Apr 4, 2026 |
| 3621 | Sightseeing Cows | 33%(4919/14808) | Sep 2, 2026 |
| 3631 | Cuckoo Hashing | 33%(447/1345) | Aug 25, 2026 |
| 3683 | Priest John's Busiest Day | 33%(5170/15450) | Sep 2, 2026 |
| 3623 | Best Cow Line, Gold | 33%(2361/7031) | Apr 4, 2026 |
| 3611 | Minimum Weighted Perfect Fractional b-Matching | 34%(48/141) | Dec 10, 2025 |
| 3633 | Copying DNA | 34%(315/921) | May 6, 2026 |
| 3612 | Telephone Wire | 34%(1345/3914) | Aug 8, 2026 |
| 3694 | Network | 34%(6534/18848) | Aug 14, 2026 |
| 3659 | Cell Phone Network | 34%(3449/9876) | Aug 27, 2026 |
| 3662 | Telephone Lines | 34%(5036/14406) | Aug 30, 2026 |
| 3639 | Exchange Rates | 34%(988/2823) | Aug 8, 2026 |
| 3614 | Sunscreen | 35%(6698/18867) | Sep 4, 2026 |
| 3658 | Artificial Lake | 35%(869/2443) | Aug 21, 2026 |
| 3622 | Gourmet Grazers | 35%(1027/2863) | Aug 9, 2026 |
| 3684 | Physics Experiment | 35%(1898/5284) | Sep 2, 2026 |
| 3678 | Katu Puzzle | 36%(5453/15147) | Sep 3, 2026 |
| 3688 | Cheat in the Game | 36%(722/2002) | Aug 15, 2026 |
| 3609 | Reset Sequence | 36%(369/1013) | Mar 16, 2026 |
| 3665 | iCow | 36%(2575/7031) | Apr 4, 2026 |
| 3635 | Full Tank? | 36%(6307/17133) | Sep 3, 2026 |
| 3661 | Running | 37%(3340/8974) | Aug 6, 2026 |
| 3668 | Game of Lines | 37%(2831/7514) | Apr 4, 2026 |
| 3655 | Guard | 37%(101/268) | Oct 21, 2025 |
| 3600 | Subimage Recognition | 38%(1272/3344) | Aug 8, 2026 |
| 3663 | Costume Party | 39%(6915/17717) | Jun 20, 2026 |
| 3613 | Cow Relays | 39%(4712/11981) | Aug 11, 2026 |
| 3686 | The Windy's | 39%(2970/7462) | Aug 13, 2026 |
| 3656 | Rock Skipping | 40%(727/1778) | Aug 8, 2026 |
| 3671 | Dining Cows | 40%(3867/9450) | Jun 2, 2026 |
| 3649 | Typesetting | 41%(259/629) | Sep 5, 2026 |
| 3606 | Sheryl's Circuit II | 41%(222/536) | Dec 10, 2025 |
| 3605 | Sheryl's Circuit I | 41%(525/1257) | Aug 15, 2026 |
| 3624 | Charm Bracelet | 42%(33213/78758) | Aug 17, 2026 |
| 3615 | Cow Hurdles | 42%(4510/10606) | Aug 5, 2026 |
| 3653 | Here We Go(relians) Again | 42%(739/1732) | Aug 9, 2026 |
| 3638 | Moogle | 42%(612/1427) | Aug 13, 2026 |
| 3641 | Pseudoprime numbers | 42%(7898/18368) | Aug 11, 2026 |
| 3680 | Intervals | 43%(4557/10579) | Aug 27, 2026 |
| 3667 | Hotel | 43%(11336/26165) | Aug 31, 2026 |
| 3602 | Typographical Ligatures | 43%(582/1334) | Mar 6, 2026 |
| 3628 | Bookshelf 2 | 44%(6308/14186) | Jul 3, 2026 |
| 3691 | DNA repair | 45%(3944/8746) | Aug 22, 2026 |
| 3666 | Making the Grade | 45%(7723/17057) | Aug 31, 2026 |
| 3616 | Milking Time | 46%(12631/27410) | Aug 22, 2026 |
| 3619 | Speed Reading | 46%(4695/10001) | Dec 10, 2025 |
| 3692 | Kindergarten | 47%(4518/9524) | Aug 25, 2026 |
| 3646 | The Dragon of Loowater | 47%(2326/4894) | Jun 13, 2026 |
| 3618 | Exploration | 47%(2458/5132) | Apr 5, 2026 |
| 3670 | Eating Together | 48%(3888/8054) | Jul 17, 2026 |
| 3627 | Bookshelf | 49%(5114/10359) | Jul 11, 2026 |
| 3664 | Election Time | 49%(6374/12811) | Aug 1, 2026 |
| 3620 | Avoid The Lakes | 51%(5427/10578) | Jul 1, 2026 |
| 3672 | Long Distance Racing | 53%(4942/9293) | Apr 4, 2026 |
| 3626 | Mud Puddles | 55%(2115/3837) | Jul 25, 2026 |
| 3660 | Cow Contest | 55%(16158/28918) | Aug 12, 2026 |
| 3652 | Persistent Bits | 57%(1651/2890) | Jul 31, 2026 |
| 3637 | Shopaholic | 57%(3199/5578) | Jul 20, 2026 |
| 3654 | Electronic Document Security | 58%(690/1173) | Sep 6, 2026 |
| 3632 | Optimal Parking | 60%(5194/8654) | Aug 22, 2026 |
| 3650 | The Seven Percent Solution | 66%(5553/8315) | Jun 15, 2026 |
| 3673 | Cow Multiplication | 68%(10139/14708) | Jun 15, 2026 |
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