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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%(147/1556) | Sep 8, 2025 |
| 3677 | Chemical Weighing | 15%(94/605) | Aug 1, 2025 |
| 3607 | Distribution of Toys | 16%(206/1245) | Sep 10, 2025 |
| 3676 | Tomorrow Genius 2008 | 17%(18/105) | Sep 23, 2019 |
| 3642 | Carpool | 19%(174/902) | Jun 19, 2025 |
| 3690 | Constellations | 20%(1642/7955) | Sep 8, 2025 |
| 3674 | Super Assassin | 22%(564/2554) | Sep 2, 2025 |
| 3647 | Tournament | 22%(170/760) | Sep 5, 2025 |
| 3651 | Slink | 24%(27/112) | May 30, 2022 |
| 3603 | Zen Puzzle Garden | 24%(75/305) | Mar 1, 2024 |
| 3696 | The Luckiest number | 24%(3129/12723) | Aug 28, 2025 |
| 3617 | Best Cow Line | 24%(16051/64842) | Sep 17, 2025 |
| 3610 | Maclaurin Series of Reciprocals | 24%(64/258) | Jul 16, 2024 |
| 3604 | Professor Ben | 25%(2361/9284) | May 15, 2025 |
| 3669 | Meteor Shower | 25%(10371/40769) | Sep 22, 2025 |
| 3630 | Phone List | 25%(13768/53099) | Sep 29, 2025 |
| 3645 | Smeech | 26%(717/2751) | Dec 10, 2024 |
| 3657 | Haybale Guessing | 26%(780/2949) | Sep 1, 2025 |
| 3625 | Building Roads | 26%(3911/14493) | Sep 14, 2025 |
| 3675 | Telescope | 27%(1275/4696) | Sep 2, 2025 |
| 3640 | Conformity | 27%(1091/4009) | Sep 2, 2025 |
| 3636 | Nested Dolls | 27%(2535/9190) | May 3, 2025 |
| 3643 | Friend or Foe? | 28%(305/1078) | Sep 14, 2025 |
| 3608 | Bridge Across Islands | 28%(4203/14714) | Sep 11, 2025 |
| 3687 | Labeling Balls | 28%(5927/20535) | Sep 20, 2025 |
| 3679 | The Delivery of Control | 29%(74/253) | Aug 27, 2022 |
| 3699 | miniSQL | 29%(748/2509) | Sep 2, 2025 |
| 3695 | Rectangles | 30%(1309/4352) | Feb 10, 2025 |
| 3648 | Wedding | 30%(4314/14332) | Sep 8, 2025 |
| 3681 | Finding the Rectangle | 30%(1031/3404) | Sep 18, 2024 |
| 3693 | Maximum repetition substring | 30%(4484/14792) | Sep 25, 2025 |
| 3697 | USTC campus network | 30%(1598/5241) | Sep 2, 2025 |
| 3601 | Tower of Hanoi | 30%(781/2552) | May 6, 2025 |
| 3644 | Gangs | 31%(152/483) | Sep 2, 2025 |
| 3685 | Matrix | 31%(4824/15108) | Aug 25, 2025 |
| 3682 | King Arthur's Birthday Celebration | 32%(1505/4602) | Sep 8, 2025 |
| 3631 | Cuckoo Hashing | 33%(444/1340) | Mar 8, 2025 |
| 3621 | Sightseeing Cows | 33%(4889/14746) | Aug 27, 2025 |
| 3634 | Circle of Debt | 33%(110/329) | Sep 8, 2025 |
| 3683 | Priest John's Busiest Day | 33%(5140/15343) | Sep 25, 2025 |
| 3623 | Best Cow Line, Gold | 33%(2355/7014) | Sep 1, 2025 |
| 3612 | Telephone Wire | 34%(1337/3894) | May 3, 2025 |
| 3633 | Copying DNA | 34%(315/912) | Nov 5, 2024 |
| 3694 | Network | 34%(6503/18744) | Sep 28, 2025 |
| 3662 | Telephone Lines | 34%(4992/14330) | Sep 23, 2025 |
| 3659 | Cell Phone Network | 34%(3428/9837) | Sep 22, 2025 |
| 3639 | Exchange Rates | 34%(981/2804) | Nov 19, 2024 |
| 3611 | Minimum Weighted Perfect Fractional b-Matching | 35%(48/136) | Sep 1, 2025 |
| 3614 | Sunscreen | 35%(6676/18815) | Sep 23, 2025 |
| 3658 | Artificial Lake | 35%(865/2436) | May 4, 2025 |
| 3684 | Physics Experiment | 35%(1884/5261) | Jul 26, 2025 |
| 3622 | Gourmet Grazers | 35%(1026/2857) | Jul 21, 2024 |
| 3678 | Katu Puzzle | 35%(5441/15128) | Jun 23, 2025 |
| 3629 | Card Stacking | 36%(2875/7974) | Oct 9, 2025 |
| 3665 | iCow | 36%(2558/7013) | Sep 14, 2025 |
| 3609 | Reset Sequence | 36%(368/1004) | May 27, 2025 |
| 3635 | Full Tank? | 36%(6279/17051) | Oct 9, 2025 |
| 3661 | Running | 37%(3330/8946) | Sep 12, 2025 |
| 3668 | Game of Lines | 37%(2823/7499) | Sep 14, 2025 |
| 3655 | Guard | 37%(101/267) | Feb 21, 2025 |
| 3600 | Subimage Recognition | 38%(1266/3327) | Sep 2, 2025 |
| 3688 | Cheat in the Game | 38%(677/1737) | Sep 22, 2025 |
| 3663 | Costume Party | 39%(6900/17692) | Oct 9, 2025 |
| 3613 | Cow Relays | 39%(4641/11803) | Oct 9, 2025 |
| 3686 | The Windy's | 39%(2962/7417) | Nov 11, 2024 |
| 3656 | Rock Skipping | 40%(724/1775) | Sep 1, 2025 |
| 3671 | Dining Cows | 40%(3855/9419) | May 19, 2025 |
| 3649 | Typesetting | 41%(258/626) | Sep 1, 2025 |
| 3606 | Sheryl's Circuit II | 41%(222/533) | Jun 21, 2024 |
| 3624 | Charm Bracelet | 41%(32327/77557) | Sep 22, 2025 |
| 3605 | Sheryl's Circuit I | 41%(524/1253) | Jun 7, 2024 |
| 3615 | Cow Hurdles | 42%(4492/10580) | Sep 14, 2025 |
| 3653 | Here We Go(relians) Again | 42%(737/1728) | Sep 2, 2025 |
| 3641 | Pseudoprime numbers | 42%(7864/18320) | Sep 20, 2025 |
| 3638 | Moogle | 42%(611/1421) | Dec 3, 2024 |
| 3680 | Intervals | 43%(4534/10515) | Sep 17, 2025 |
| 3667 | Hotel | 43%(11269/26008) | Sep 5, 2025 |
| 3602 | Typographical Ligatures | 43%(579/1328) | May 2, 2025 |
| 3628 | Bookshelf 2 | 44%(6287/14157) | Sep 16, 2025 |
| 3691 | DNA repair | 45%(3936/8735) | Sep 14, 2025 |
| 3666 | Making the Grade | 45%(7674/16930) | Sep 24, 2025 |
| 3616 | Milking Time | 45%(12103/26517) | Sep 24, 2025 |
| 3619 | Speed Reading | 46%(4695/9996) | Sep 14, 2025 |
| 3646 | The Dragon of Loowater | 47%(2310/4869) | Sep 1, 2025 |
| 3692 | Kindergarten | 47%(4506/9489) | Mar 12, 2025 |
| 3618 | Exploration | 47%(2447/5116) | Sep 14, 2025 |
| 3670 | Eating Together | 48%(3878/8037) | Sep 14, 2025 |
| 3664 | Election Time | 48%(6118/12530) | Sep 14, 2025 |
| 3627 | Bookshelf | 49%(5095/10330) | Sep 14, 2025 |
| 3620 | Avoid The Lakes | 51%(5415/10560) | Sep 14, 2025 |
| 3672 | Long Distance Racing | 53%(4937/9277) | Sep 14, 2025 |
| 3626 | Mud Puddles | 55%(2103/3818) | May 3, 2025 |
| 3660 | Cow Contest | 55%(16123/28871) | Sep 11, 2025 |
| 3652 | Persistent Bits | 56%(1637/2875) | May 10, 2025 |
| 3637 | Shopaholic | 57%(3190/5554) | Sep 10, 2025 |
| 3654 | Electronic Document Security | 59%(686/1158) | Sep 1, 2025 |
| 3632 | Optimal Parking | 59%(5181/8636) | Sep 11, 2025 |
| 3650 | The Seven Percent Solution | 66%(5544/8301) | May 12, 2025 |
| 3673 | Cow Multiplication | 68%(10118/14685) | Sep 14, 2025 |
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