| ID | Title | Ratio(AC/submit) |
Date |
| 3500 | Youth Hostel Dorm | 25%(116/454) | Dec 10, 2025 |
| 3501 | Escape from Enemy Territory | 26%(851/3208) | Jan 25, 2026 |
| 3502 | Flight Safety | 20%(174/856) | Dec 10, 2025 |
| 3503 | Summits | 35%(482/1365) | Jan 7, 2026 |
| 3504 | Obfuscation | 19%(603/3139) | Dec 10, 2025 |
| 3505 | Tower Parking | 61%(1231/2014) | Jan 7, 2026 |
| 3506 | Walk | 29%(157/534) | Dec 10, 2025 |
| 3507 | Judging Olympia | 47%(4321/9173) | Jan 7, 2026 |
| 3508 | Hide That Number | 27%(2003/7167) | Nov 26, 2025 |
| 3509 | Rotating Rings | 38%(813/2117) | Jan 8, 2026 |
| 3510 | A Tale from the Dark Side of the Moon | 27%(943/3401) | Dec 10, 2025 |
| 3511 | Fermat's Christmas Theorem | 21%(1903/8972) | Jan 7, 2026 |
| 3512 | Incidental Points | 22%(1195/5326) | Dec 10, 2025 |
| 3513 | Let's Go to the Movies | 20%(597/2852) | Dec 10, 2025 |
| 3514 | The Writers' Club | 20%(189/904) | Feb 2, 2026 |
| 3515 | Moving Sticks | 29%(82/281) | Dec 10, 2025 |
| 3516 | Johnny Hates Math | 11%(444/3706) | Jan 8, 2026 |
| 3517 | And Then There Was One | 55%(3541/6395) | Jan 8, 2026 |
| 3518 | Prime Gap | 56%(7048/12557) | Jan 8, 2026 |
| 3519 | Minimal Backgammon | 57%(772/1353) | Jan 7, 2026 |
| 3520 | Lowest Pyramid | 23%(87/377) | Dec 10, 2025 |
| 3521 | Geometric Map | 39%(159/403) | Dec 10, 2025 |
| 3522 | Slim Span | 52%(6162/11709) | Nov 25, 2025 |
| 3523 | The Morning after Halloween | 22%(807/3520) | Feb 2, 2026 |
| 3524 | Bug Hunt | 46%(402/862) | Dec 10, 2025 |
| 3525 | Most Distant Point from the Sea | 42%(3317/7714) | Jan 18, 2026 |
| 3526 | The Teacher’s Side of Math | 29%(250/849) | Jan 7, 2026 |
| 3527 | Generalized Connect Four | 17%(121/690) | Jan 7, 2026 |
| 3528 | Ultimate Weapon | 47%(1278/2694) | Jan 31, 2026 |
| 3529 | Matrix Analysis | 22%(39/171) | Dec 3, 2025 |
| 3530 | A Modular Arithmetic Challenge | 16%(340/2106) | Jan 9, 2026 |
| 3531 | Alternating Sum of Digits | 17%(46/262) | Dec 10, 2025 |
| 3532 | Resistance | 33%(519/1556) | Jan 8, 2026 |
| 3533 | Light Switching Game | 59%(403/674) | Jan 19, 2026 |
| 3534 | Escape of Life and Death | 12%(328/2609) | Jan 15, 2026 |
| 3535 | A+B | 40%(406/998) | Feb 7, 2026 |
| 3536 | Beer Refrigerator | 39%(2327/5905) | Jan 16, 2026 |
| 3537 | Crosses and Crosses | 37%(2184/5791) | Jan 19, 2026 |
| 3538 | Domestic Networks | 25%(291/1159) | Jan 20, 2026 |
| 3539 | Elevator | 27%(519/1866) | Jan 27, 2026 |
| 3540 | Formula | 17%(23/135) | Dec 10, 2025 |
| 3541 | Given a string… | 21%(422/1960) | Jan 28, 2026 |
| 3542 | History of Football | 23%(283/1230) | Feb 26, 2026 |
| 3543 | iChess | 44%(1187/2671) | Feb 3, 2026 |
| 3544 | Journey with Pigs | 31%(1126/3567) | Feb 5, 2026 |
| 3545 | K’ak’-u-pakal and Mayan Script | 15%(28/184) | Feb 25, 2026 |
| 3546 | Sea battle | 34%(482/1387) | Jan 7, 2026 |
| 3547 | Cube evolvent | 26%(104/397) | Dec 10, 2025 |
| 3548 | Restoring the digits | 31%(195/626) | Jan 8, 2026 |
| 3549 | GSM phone | 12%(53/422) | Jan 8, 2026 |
| 3550 | AT – sequence | 33%(288/859) | Jan 7, 2026 |
| 3551 | Putin-chess | 18%(28/148) | Dec 3, 2025 |
| 3552 | Snatch! | 23%(69/293) | Dec 10, 2025 |
| 3553 | Task schedule | 58%(471/806) | Jan 7, 2026 |
| 3554 | Almost the shortest route | 25%(352/1380) | Jan 7, 2026 |
| 3555 | Cocktail | 21%(110/507) | Dec 10, 2025 |
| 3556 | Increasing subsequences | 24%(74/304) | Jan 8, 2026 |
| 3557 | Map Generator | 26%(475/1767) | Nov 20, 2025 |
| 3558 | Map Generator returns (MG-II) | 45%(144/320) | Jan 8, 2026 |
| 3559 | Trigonometric optimization | 10%(55/525) | Jan 8, 2026 |
| 3560 | Supersquare | 17%(38/213) | Dec 10, 2025 |
| 3561 | Pseudographical recognizer | 40%(997/2449) | Nov 20, 2025 |
| 3562 | “Roman” corridor | 34%(190/553) | Nov 26, 2025 |
| 3563 | Parabolic teleports | 6%(13/216) | Jan 30, 2026 |
| 3564 | Magic pyramid | 15%(30/197) | Dec 10, 2025 |
| 3565 | Ants | 32%(3148/9712) | Feb 3, 2026 |
| 3566 | Building for UN | 44%(912/2056) | Nov 20, 2025 |
| 3567 | Cactus Reloaded | 32%(423/1318) | Dec 10, 2025 |
| 3568 | Diver | 49%(81/165) | Dec 10, 2025 |
| 3569 | Equation | 18%(130/694) | Dec 3, 2025 |
| 3570 | Fund Management | 20%(160/779) | Dec 10, 2025 |
| 3571 | Game | 27%(116/428) | Dec 3, 2025 |
| 3572 | Hanoi Towers | 49%(379/769) | Dec 10, 2025 |
| 3573 | I18n | 24%(366/1500) | Jan 8, 2026 |
| 3574 | Japanese Writing | 48%(120/249) | Oct 20, 2025 |
| 3575 | Kingdom Partitioning | 14%(40/279) | Dec 10, 2025 |
| 3576 | Language Recognition | 26%(540/2019) | Dec 10, 2025 |
| 3577 | Global Positioning System | 8%(106/1299) | Dec 10, 2025 |
| 3578 | Card Game | 11%(83/718) | Feb 2, 2026 |
| 3579 | Median | 32%(8899/27016) | Feb 3, 2026 |
| 3580 | SuperMemo | 29%(7340/24658) | Feb 26, 2026 |
| 3581 | Sequence | 22%(2411/10605) | Feb 2, 2026 |
| 3582 | Last Hit | 1%(8/642) | Dec 10, 2025 |
| 3583 | Text Message Formatting | 13%(140/1022) | Dec 10, 2025 |
| 3584 | Small Polynomial Factorization | 19%(64/332) | Dec 3, 2025 |
| 3585 | Accumulation Degree | 21%(2863/13586) | Feb 25, 2026 |
| 3586 | The missionaries and cannibals | 9%(90/933) | Feb 2, 2026 |
| 3587 | The Biggest Cake | 17%(625/3504) | Jan 8, 2026 |
| 3588 | The Downloading Task | 25%(372/1442) | Jan 8, 2026 |
| 3589 | Number-guessing Game | 71%(5438/7640) | Jan 7, 2026 |
| 3590 | The shuffle Problem | 32%(872/2643) | Feb 1, 2026 |
| 3591 | Ants and Aphides | 8%(30/369) | Dec 10, 2025 |
| 3592 | Instantaneous Transference | 22%(1817/8092) | Jan 8, 2026 |
| 3593 | Sea Base Exploration | 27%(455/1643) | Jan 8, 2026 |
| 3594 | Escort of Dr. Who How | 27%(789/2909) | Dec 3, 2025 |
| 3595 | Full Steiner Topologies | 35%(266/757) | Dec 10, 2025 |
| 3596 | Illuminated Planet | 29%(103/354) | Jan 7, 2026 |
| 3597 | Polygon Division | 53%(762/1437) | Dec 3, 2025 |
| 3598 | PopKart | 22%(245/1089) | Jan 8, 2026 |
| 3599 | Pumping Lemma | 35%(116/325) | Dec 3, 2025 |
