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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 |
| 1402 | The Game of Master-Mind | 4%(110/2565) | Nov 11, 2025 |
| 1464 | Company | 10%(49/471) | Nov 25, 2025 |
| 1428 | Hermes' Colony | 12%(42/331) | Oct 18, 2025 |
| 1437 | Chat Rooms | 15%(105/690) | Nov 21, 2025 |
| 1445 | Random number | 17%(42/238) | Nov 12, 2025 |
| 1412 | Equals are Equals | 18%(92/507) | Oct 14, 2025 |
| 1452 | Signal Box | 18%(28/151) | Oct 14, 2025 |
| 1498 | Matching Meetings | 19%(53/277) | Nov 12, 2025 |
| 1490 | Cabinets | 19%(70/361) | Oct 14, 2025 |
| 1441 | Table | 19%(85/431) | Oct 14, 2025 |
| 1421 | Peter's Calculator | 20%(93/451) | Nov 21, 2025 |
| 1462 | Random Walk | 20%(191/916) | Nov 21, 2025 |
| 1403 | Hotline | 21%(178/839) | Oct 14, 2025 |
| 1424 | Diamonds | 21%(86/392) | Nov 21, 2025 |
| 1465 | Multiple | 21%(2066/9413) | Nov 21, 2025 |
| 1483 | Going in Circles on Alpha Centauri | 22%(46/209) | Oct 14, 2025 |
| 1413 | GIGA Universe Cup | 22%(66/291) | Oct 14, 2025 |
| 1446 | Moscow Time | 22%(154/677) | Nov 11, 2025 |
| 1443 | DEL command | 23%(78/332) | Oct 21, 2025 |
| 1444 | Parallelepiped walk | 23%(214/905) | Sep 6, 2025 |
| 1429 | Alice and Bob | 24%(295/1221) | Oct 14, 2025 |
| 1410 | Intersection | 24%(5608/22470) | Nov 20, 2025 |
| 1479 | MBone | 25%(38/150) | Oct 14, 2025 |
| 1447 | Ambiguous Dates | 25%(64/247) | Oct 14, 2025 |
| 1499 | Supercomputer Selection, The Sequel | 26%(46/172) | Oct 14, 2025 |
| 1487 | Single-Player Games | 26%(517/1929) | Oct 14, 2025 |
| 1453 | Delta Encoding and Decoding | 28%(229/803) | Oct 21, 2025 |
| 1457 | Lord of the Ring | 28%(203/702) | Oct 14, 2025 |
| 1489 | Egyptian Multiplication | 29%(387/1314) | Nov 21, 2025 |
| 1415 | Map of Ninja House | 29%(199/674) | Oct 14, 2025 |
| 1470 | Closest Common Ancestors | 29%(8691/29036) | Nov 21, 2025 |
| 1400 | Complicated Expressions | 30%(618/2035) | Oct 14, 2025 |
| 1423 | Big Number | 30%(9769/31917) | Nov 20, 2025 |
| 1448 | Cube | 30%(120/389) | Oct 14, 2025 |
| 1427 | Get Them All | 30%(60/194) | Oct 14, 2025 |
| 1417 | True Liars | 31%(3661/11772) | Nov 21, 2025 |
| 1460 | Firefighters | 31%(362/1152) | Nov 21, 2025 |
| 1407 | e-Market | 32%(157/490) | Nov 21, 2025 |
| 1438 | One-way Traffic | 32%(392/1215) | Oct 21, 2025 |
| 1472 | Instant Complexity | 32%(1023/3136) | Nov 21, 2025 |
| 1434 | Fill the Cisterns! | 32%(1483/4528) | Nov 21, 2025 |
| 1478 | Island of Logic | 33%(227/677) | Oct 14, 2025 |
| 1475 | Pushing Boxes | 33%(3969/11765) | Nov 24, 2025 |
| 1451 | T9 | 33%(1847/5461) | Oct 14, 2025 |
| 1495 | LED Test | 33%(183/540) | Oct 14, 2025 |
| 1480 | Optimal Programs | 34%(546/1573) | Oct 14, 2025 |
| 1431 | Calendar of Maya | 35%(102/288) | Oct 14, 2025 |
| 1411 | Calling Extraterrestrial Intelligence Again | 35%(5022/14158) | Nov 21, 2025 |
| 1436 | Horizontally Visible Segments | 35%(2462/6873) | Nov 7, 2025 |
| 1409 | 77377 | 36%(360/992) | Nov 21, 2025 |
| 1471 | Triangles | 36%(844/2319) | Oct 14, 2025 |
| 1494 | Sunrise | 36%(171/469) | Nov 21, 2025 |
| 1461 | Binary Polynomials | 37%(198/534) | Nov 21, 2025 |
| 1477 | Box of Bricks | 37%(10192/27439) | Nov 22, 2025 |
| 1405 | Heritage | 37%(2996/8006) | Oct 14, 2025 |
| 1481 | The Die Is Cast | 37%(697/1860) | Oct 14, 2025 |
| 1486 | Sorting Slides | 37%(2434/6490) | Nov 20, 2025 |
| 1469 | COURSES | 37%(12411/32919) | Nov 22, 2025 |
| 1426 | Find The Multiple | 37%(31553/83155) | Nov 25, 2025 |
| 1484 | Blowing Fuses | 38%(1753/4596) | Nov 20, 2025 |
| 1439 | Rhombs | 38%(79/205) | Nov 21, 2025 |
| 1449 | Enigma | 38%(87/225) | Oct 21, 2025 |
| 1485 | Fast Food | 38%(1531/3949) | Nov 21, 2025 |
| 1482 | It's not a Bug, It's a Feature! | 39%(665/1691) | Nov 21, 2025 |
| 1432 | Decoding Morse Sequences | 39%(745/1882) | Oct 14, 2025 |
| 1442 | Black Box | 39%(8771/22090) | Nov 17, 2025 |
| 1418 | Viva Confetti | 40%(555/1384) | Oct 14, 2025 |
| 1430 | Binary Stirling Numbers | 40%(906/2248) | Nov 20, 2025 |
| 1467 | Symbolic Derivation | 41%(74/177) | Oct 14, 2025 |
| 1463 | Strategic game | 42%(7017/16612) | Nov 23, 2025 |
| 1456 | Supermarket | 42%(14114/33328) | Nov 21, 2025 |
| 1454 | Factorial Frequencies | 42%(1265/2969) | Nov 21, 2025 |
| 1458 | Common Subsequence | 42%(38614/90591) | Nov 25, 2025 |
| 1474 | Video Surveillance | 42%(2510/5845) | Nov 21, 2025 |
| 1473 | There's Treasure Everywhere! | 43%(976/2263) | Nov 21, 2025 |
| 1497 | Molecules | 43%(123/282) | Oct 14, 2025 |
| 1435 | Gates | 44%(149/335) | Oct 21, 2025 |
| 1466 | Girls and Boys | 45%(7127/15727) | Nov 23, 2025 |
| 1419 | Graph Coloring | 45%(3425/7497) | Oct 14, 2025 |
| 1420 | Spreadsheet | 46%(477/1034) | Nov 21, 2025 |
| 1450 | Gridland | 47%(5013/10566) | Nov 25, 2025 |
| 1433 | Exchanges | 48%(254/528) | Oct 18, 2024 |
| 1404 | I-Keyboard | 48%(2204/4562) | Oct 14, 2025 |
| 1440 | Varacious Steve | 48%(232/480) | Oct 14, 2025 |
| 1425 | Enigmatic Travel | 49%(140/284) | Nov 20, 2025 |
| 1488 | TEX Quotes | 50%(6747/13267) | Nov 20, 2025 |
| 1459 | Power Network | 50%(17661/34693) | Nov 23, 2025 |
| 1468 | Rectangles | 50%(1851/3631) | Nov 20, 2025 |
| 1476 | Always On the Run | 51%(414/801) | Nov 20, 2025 |
| 1416 | Shredding Company | 52%(4620/8806) | Nov 26, 2025 |
| 1491 | Pi | 54%(2879/5281) | Nov 20, 2025 |
| 1496 | Word Index | 54%(3257/5925) | Nov 21, 2025 |
| 1492 | Up and Down Sequences | 56%(448/800) | Oct 14, 2025 |
| 1408 | Fishnet | 58%(1734/2959) | Nov 20, 2025 |
| 1422 | Air Raid | 58%(6704/11399) | Nov 23, 2025 |
| 1493 | Machined Surfaces | 59%(2569/4312) | Nov 21, 2025 |
| 1401 | Factorial | 59%(11262/18771) | Nov 23, 2025 |
| 1406 | Starship Hakodate-maru | 60%(978/1630) | Oct 14, 2025 |
| 1414 | Life Line | 66%(819/1226) | Nov 18, 2025 |
| 1455 | Crazy tea party | 67%(5358/7938) | Nov 20, 2025 |
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