| ID | Title | Ratio(AC/submit) |
Date |
| 3689 | Equations | 9%(148/1559) | Jan 7, 2026 |
| 3677 | Chemical Weighing | 15%(94/609) | Dec 10, 2025 |
| 3607 | Distribution of Toys | 16%(206/1248) | Dec 3, 2025 |
| 3676 | Tomorrow Genius 2008 | 16%(18/107) | Dec 3, 2025 |
| 3642 | Carpool | 19%(178/922) | Apr 4, 2026 |
| 3690 | Constellations | 20%(1644/7965) | Apr 4, 2026 |
| 3674 | Super Assassin | 22%(564/2560) | Dec 10, 2025 |
| 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%(3141/12747) | Apr 14, 2026 |
| 3617 | Best Cow Line | 24%(16093/64961) | Apr 4, 2026 |
| 3604 | Professor Ben | 25%(2361/9288) | Dec 10, 2025 |
| 3669 | Meteor Shower | 25%(10382/40833) | Apr 7, 2026 |
| 3630 | Phone List | 25%(13805/53271) | Apr 13, 2026 |
| 3645 | Smeech | 26%(717/2755) | Dec 10, 2025 |
| 3657 | Haybale Guessing | 26%(780/2952) | Dec 3, 2025 |
| 3625 | Building Roads | 27%(3918/14510) | Apr 4, 2026 |
| 3675 | Telescope | 27%(1279/4721) | Apr 4, 2026 |
| 3640 | Conformity | 27%(1097/4025) | Apr 4, 2026 |
| 3636 | Nested Dolls | 27%(2537/9195) | Jan 9, 2026 |
| 3608 | Bridge Across Islands | 28%(4208/14721) | Apr 3, 2026 |
| 3643 | Friend or Foe? | 28%(311/1086) | Mar 16, 2026 |
| 3687 | Labeling Balls | 28%(5935/20566) | Apr 5, 2026 |
| 3679 | The Delivery of Control | 29%(74/255) | Dec 10, 2025 |
| 3699 | miniSQL | 29%(748/2514) | Jan 8, 2026 |
| 3648 | Wedding | 30%(4320/14347) | Mar 16, 2026 |
| 3695 | Rectangles | 30%(1315/4362) | Apr 4, 2026 |
| 3681 | Finding the Rectangle | 30%(1037/3421) | Apr 4, 2026 |
| 3693 | Maximum repetition substring | 30%(4499/14836) | Apr 13, 2026 |
| 3601 | Tower of Hanoi | 30%(781/2557) | Mar 25, 2026 |
| 3697 | USTC campus network | 30%(1607/5254) | Apr 4, 2026 |
| 3644 | Gangs | 31%(152/487) | Jan 8, 2026 |
| 3685 | Matrix | 31%(4837/15130) | Apr 4, 2026 |
| 3629 | Card Stacking | 32%(3026/9353) | Apr 12, 2026 |
| 3682 | King Arthur's Birthday Celebration | 32%(1517/4618) | Apr 4, 2026 |
| 3634 | Circle of Debt | 33%(114/345) | Apr 4, 2026 |
| 3621 | Sightseeing Cows | 33%(4893/14782) | Apr 1, 2026 |
| 3631 | Cuckoo Hashing | 33%(446/1344) | Jan 7, 2026 |
| 3683 | Priest John's Busiest Day | 33%(5156/15406) | Apr 6, 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%(315/920) | Apr 4, 2026 |
| 3612 | Telephone Wire | 34%(1343/3911) | Apr 4, 2026 |
| 3694 | Network | 34%(6515/18803) | Apr 5, 2026 |
| 3662 | Telephone Lines | 34%(5002/14352) | Feb 25, 2026 |
| 3659 | Cell Phone Network | 34%(3437/9861) | Apr 5, 2026 |
| 3639 | Exchange Rates | 34%(986/2818) | Apr 4, 2026 |
| 3614 | Sunscreen | 35%(6689/18855) | Mar 22, 2026 |
| 3658 | Artificial Lake | 35%(866/2440) | Jan 7, 2026 |
| 3684 | Physics Experiment | 35%(1888/5269) | Mar 17, 2026 |
| 3622 | Gourmet Grazers | 35%(1026/2862) | Jan 8, 2026 |
| 3678 | Katu Puzzle | 35%(5445/15136) | Jan 7, 2026 |
| 3609 | Reset Sequence | 36%(369/1013) | Mar 16, 2026 |
| 3665 | iCow | 36%(2575/7031) | Apr 4, 2026 |
| 3635 | Full Tank? | 36%(6292/17085) | Apr 11, 2026 |
| 3661 | Running | 37%(3336/8963) | Apr 4, 2026 |
| 3668 | Game of Lines | 37%(2831/7514) | Apr 4, 2026 |
| 3655 | Guard | 37%(101/268) | Oct 21, 2025 |
| 3600 | Subimage Recognition | 38%(1271/3343) | Apr 4, 2026 |
| 3688 | Cheat in the Game | 38%(680/1752) | Apr 10, 2026 |
| 3663 | Costume Party | 39%(6914/17716) | Apr 4, 2026 |
| 3613 | Cow Relays | 39%(4679/11912) | Apr 6, 2026 |
| 3686 | The Windy's | 39%(2963/7429) | Apr 4, 2026 |
| 3656 | Rock Skipping | 40%(726/1777) | Nov 26, 2025 |
| 3671 | Dining Cows | 40%(3861/9439) | Apr 4, 2026 |
| 3649 | Typesetting | 41%(258/628) | Dec 10, 2025 |
| 3606 | Sheryl's Circuit II | 41%(222/536) | Dec 10, 2025 |
| 3605 | Sheryl's Circuit I | 41%(524/1256) | Dec 3, 2025 |
| 3624 | Charm Bracelet | 41%(32661/78044) | Apr 13, 2026 |
| 3615 | Cow Hurdles | 42%(4498/10591) | Jan 7, 2026 |
| 3653 | Here We Go(relians) Again | 42%(738/1731) | Dec 10, 2025 |
| 3638 | Moogle | 42%(611/1426) | Dec 3, 2025 |
| 3641 | Pseudoprime numbers | 42%(7891/18360) | Apr 10, 2026 |
| 3680 | Intervals | 43%(4553/10575) | Mar 24, 2026 |
| 3667 | Hotel | 43%(11312/26124) | Apr 9, 2026 |
| 3602 | Typographical Ligatures | 43%(582/1334) | Mar 6, 2026 |
| 3628 | Bookshelf 2 | 44%(6305/14180) | Apr 4, 2026 |
| 3691 | DNA repair | 45%(3941/8743) | Mar 20, 2026 |
| 3666 | Making the Grade | 45%(7700/17024) | Mar 22, 2026 |
| 3616 | Milking Time | 45%(12296/26944) | Apr 4, 2026 |
| 3619 | Speed Reading | 46%(4695/10001) | Dec 10, 2025 |
| 3692 | Kindergarten | 47%(4515/9516) | Apr 4, 2026 |
| 3646 | The Dragon of Loowater | 47%(2321/4889) | Apr 4, 2026 |
| 3618 | Exploration | 47%(2458/5132) | Apr 5, 2026 |
| 3670 | Eating Together | 48%(3886/8050) | Apr 4, 2026 |
| 3627 | Bookshelf | 49%(5113/10358) | Apr 4, 2026 |
| 3664 | Election Time | 49%(6368/12801) | Apr 12, 2026 |
| 3620 | Avoid The Lakes | 51%(5423/10574) | Apr 4, 2026 |
| 3672 | Long Distance Racing | 53%(4942/9293) | Apr 4, 2026 |
| 3626 | Mud Puddles | 55%(2111/3833) | Apr 4, 2026 |
| 3660 | Cow Contest | 55%(16144/28903) | Apr 14, 2026 |
| 3652 | Persistent Bits | 57%(1649/2888) | Apr 4, 2026 |
| 3637 | Shopaholic | 57%(3197/5574) | Apr 7, 2026 |
| 3654 | Electronic Document Security | 59%(688/1164) | Apr 5, 2026 |
| 3632 | Optimal Parking | 60%(5193/8648) | Apr 4, 2026 |
| 3650 | The Seven Percent Solution | 66%(5552/8314) | Apr 5, 2026 |
| 3673 | Cow Multiplication | 68%(10138/14707) | Apr 4, 2026 |
