| ID | Title | Ratio(AC/submit) |
Date |
| 3403 | "Bloody Mary" | 5%(46/913) | May 9, 2026 |
| 3464 | Approximations | 5%(27/491) | Dec 10, 2025 |
| 3491 | Rotated Sky Charts | 7%(37/478) | Dec 10, 2025 |
| 3496 | Word Hyphenation | 8%(13/148) | Dec 3, 2025 |
| 3457 | Mineshaft | 10%(12/114) | Dec 10, 2025 |
| 3466 | Distance to the Prey | 13%(35/253) | Dec 3, 2025 |
| 3477 | System of Linear Equations | 14%(88/623) | Mar 16, 2026 |
| 3471 | Integral Roots | 14%(350/2465) | May 6, 2026 |
| 3428 | Formatting function | 14%(343/2364) | Dec 10, 2025 |
| 3479 | RoBa Has a Second Art Gallery! | 14%(85/574) | Mar 16, 2026 |
| 3476 | A Game with Colored Balls | 15%(558/3551) | Mar 22, 2026 |
| 3490 | Jumping Frogs | 15%(46/291) | Mar 21, 2026 |
| 3409 | Broken line | 16%(305/1879) | Apr 4, 2026 |
| 3470 | Walls | 16%(527/3201) | Jan 8, 2026 |
| 3424 | Better security | 18%(356/1883) | Jan 8, 2026 |
| 3453 | Soccer Tournament | 19%(167/853) | Mar 6, 2026 |
| 3474 | Ellipsoid | 20%(27/134) | Mar 16, 2026 |
| 3412 | Ray | 20%(448/2153) | May 8, 2026 |
| 3418 | Quadratic Functions | 20%(183/879) | May 6, 2026 |
| 3447 | Calendar of Events | 21%(143/665) | Mar 16, 2026 |
| 3405 | Convex hull | 21%(217/998) | Mar 16, 2026 |
| 3482 | ‘JBC’ | 22%(267/1213) | Mar 22, 2026 |
| 3429 | Geometry with a ruler | 22%(395/1788) | Jan 8, 2026 |
| 3473 | Stochastic Finite State Automaton | 22%(27/119) | Mar 16, 2026 |
| 3478 | Undergraduate Instruction Evaluation | 23%(55/237) | Mar 18, 2026 |
| 3431 | Texture Tile | 23%(411/1744) | Nov 25, 2025 |
| 3434 | Terrarium | 24%(294/1225) | Dec 3, 2025 |
| 3441 | Vacation Rentals | 24%(240/963) | May 6, 2026 |
| 3499 | Containers | 25%(466/1837) | Dec 10, 2025 |
| 3492 | Knapsack II | 25%(466/1820) | Apr 4, 2026 |
| 3408 | The Domino Principle | 25%(487/1895) | Apr 4, 2026 |
| 3417 | Network | 26%(3798/14537) | Jun 4, 2026 |
| 3465 | Battle | 26%(770/2947) | May 8, 2026 |
| 3495 | Bitwise XOR of Arithmetic Progression | 26%(275/1038) | Dec 10, 2025 |
| 3402 | Add a queen | 27%(292/1059) | Apr 4, 2026 |
| 3440 | Coin Toss | 27%(1631/5904) | Dec 21, 2025 |
| 3410 | Split convex polygon | 28%(198/706) | Mar 4, 2026 |
| 3419 | Difference Is Beautiful | 28%(954/3343) | Apr 11, 2026 |
| 3467 | Cross Counting | 29%(540/1850) | Dec 10, 2025 |
| 3413 | RPG | 29%(573/1951) | Mar 16, 2026 |
| 3484 | Showstopper | 30%(1206/3997) | Apr 4, 2026 |
| 3433 | Road Accident | 30%(29/96) | Dec 9, 2025 |
| 3472 | Holey Square Tiling | 30%(308/1017) | Dec 10, 2025 |
| 3489 | Knapsack I | 30%(346/1141) | Apr 5, 2026 |
| 3443 | Team Work | 30%(349/1150) | Apr 4, 2026 |
| 3497 | Assemble | 30%(1482/4876) | Apr 4, 2026 |
| 3406 | Last digit | 30%(1028/3374) | Mar 21, 2026 |
| 3468 | A Simple Problem with Integers | 30%(65743/215287) | Jun 1, 2026 |
| 3401 | String reduction | 31%(490/1538) | Apr 4, 2026 |
| 3487 | The Stable Marriage Problem | 31%(4666/14642) | Jun 3, 2026 |
| 3430 | Pizza schedule | 31%(157/492) | Nov 24, 2025 |
| 3421 | X-factor Chains | 32%(3964/12371) | May 27, 2026 |
| 3452 | Railway Transportation | 32%(505/1568) | Mar 16, 2026 |
| 3450 | Corporate Identity | 32%(3547/10981) | May 30, 2026 |
| 3415 | Common Substrings | 33%(5798/17443) | Apr 25, 2026 |
| 3442 | Baseball | 33%(117/346) | Dec 3, 2025 |
| 3494 | Largest Submatrix of All 1’s | 33%(4238/12489) | Apr 10, 2026 |
| 3451 | Money Money Money, Must Be Funny | 34%(181/526) | Mar 6, 2026 |
| 3446 | Catch the Bus! | 34%(59/171) | Mar 6, 2026 |
| 3475 | Paper-, er, Transcript-Folding Game | 35%(847/2404) | Apr 4, 2026 |
| 3463 | Sightseeing | 35%(4738/13433) | Jun 4, 2026 |
| 3400 | Dropping the stones | 36%(728/2020) | May 6, 2026 |
| 3439 | Server Relocation | 36%(953/2631) | Apr 4, 2026 |
| 3436 | ACM Computer Factory | 36%(4951/13507) | Jan 23, 2026 |
| 3455 | Cheesy Chess | 37%(160/431) | Dec 10, 2025 |
| 3461 | Oulipo | 37%(28339/76175) | Jun 2, 2026 |
| 3485 | Highway | 37%(758/2035) | Apr 4, 2026 |
| 3426 | Doors and... more doors | 37%(191/508) | Mar 18, 2026 |
| 3411 | Paid Roads | 37%(3678/9753) | May 25, 2026 |
| 3486 | Computers | 37%(1102/2907) | May 23, 2026 |
| 3462 | Lucky Light | 38%(429/1124) | Nov 25, 2025 |
| 3449 | Geometric Shapes | 39%(1119/2833) | May 26, 2026 |
| 3414 | Pots | 39%(16116/40293) | Jun 1, 2026 |
| 3422 | Kaka's Matrix Travels | 41%(5035/12274) | Mar 22, 2026 |
| 3404 | Bridge over a rough river | 41%(1869/4516) | Apr 4, 2026 |
| 3481 | Double Queue | 42%(10638/25249) | Jun 3, 2026 |
| 3469 | Dual Core CPU | 42%(12746/30148) | Jun 3, 2026 |
| 3459 | Projects | 42%(440/1027) | Jan 8, 2026 |
| 3437 | Tree Grafting | 43%(1522/3473) | May 17, 2026 |
| 3435 | Sudoku Checker | 44%(872/1978) | Jan 7, 2026 |
| 3432 | Count Squares | 44%(1387/3125) | Jan 8, 2026 |
| 3420 | Quad Tiling | 44%(2636/5918) | Jun 2, 2026 |
| 3460 | Booksort | 45%(1554/3444) | May 16, 2026 |
| 3416 | Crossing | 45%(909/2007) | Nov 24, 2025 |
| 3498 | March of the Penguins | 46%(2776/6001) | Jun 3, 2026 |
| 3425 | Customer support | 46%(1356/2916) | Jan 8, 2026 |
| 3407 | Brookebond s'en va en guerre... | 46%(872/1856) | Jan 8, 2026 |
| 3493 | Chessboard Puzzle | 47%(283/600) | Apr 4, 2026 |
| 3448 | Roman Expressions | 47%(270/571) | Mar 21, 2026 |
| 3480 | John | 48%(2077/4252) | Apr 4, 2026 |
| 3456 | Frobenius | 49%(539/1082) | Nov 25, 2025 |
| 3423 | Automaton optimization | 52%(351/664) | Dec 10, 2025 |
| 3427 | Ecology tax | 52%(2537/4791) | Jan 7, 2026 |
| 3488 | Arne Saknussemm | 54%(783/1437) | Apr 4, 2026 |
| 3445 | Elementary Additions | 54%(1439/2638) | Apr 4, 2026 |
| 3483 | Loan Scheduling | 54%(486/890) | Nov 25, 2025 |
| 3454 | Hypertheseus | 55%(187/336) | Mar 6, 2026 |
| 3458 | Colour Sequence | 59%(853/1433) | Apr 4, 2026 |
| 3438 | Look and Say | 60%(5978/9865) | Apr 4, 2026 |
| 3444 | Wavelet Compression | 64%(1554/2399) | Apr 4, 2026 |
