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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 |
| 1300 | Door Man | 42%(1798/4190) | May 29, 2026 |
| 1301 | The Umbrella Problem: 2054 | 34%(154/444) | May 29, 2026 |
| 1302 | Blue Gene, Jr. | 58%(440/746) | May 29, 2026 |
| 1303 | Byte Me! | 35%(128/361) | May 29, 2026 |
| 1304 | World's Worst Bus Schedule | 33%(319/940) | May 29, 2026 |
| 1305 | Fermat vs. Pythagoras | 56%(1138/2028) | Mar 26, 2026 |
| 1306 | Combinations | 45%(5807/12892) | May 29, 2026 |
| 1307 | Mapping the Route | 35%(243/688) | Dec 9, 2025 |
| 1308 | Is It A Tree? | 31%(17469/55963) | May 3, 2026 |
| 1309 | Coconuts, Revisited | 41%(935/2274) | Mar 26, 2026 |
| 1310 | Nonstop Travel | 33%(200/603) | Mar 26, 2026 |
| 1311 | Doing Windows | 27%(132/480) | May 7, 2026 |
| 1312 | Numerically Speaking | 52%(727/1398) | Oct 14, 2025 |
| 1313 | Booklet Printing | 50%(1244/2461) | Mar 26, 2026 |
| 1314 | Finding Rectangles | 37%(736/1985) | May 29, 2026 |
| 1315 | Don't Get Rooked | 62%(2002/3188) | May 29, 2026 |
| 1316 | Self Numbers | 55%(14916/26996) | Feb 26, 2026 |
| 1317 | Do the Untwist | 59%(2276/3795) | Mar 26, 2026 |
| 1318 | Word Amalgamation | 47%(5363/11351) | Apr 5, 2026 |
| 1319 | Pipe Fitters | 45%(861/1901) | Oct 14, 2025 |
| 1320 | Street Numbers | 54%(1867/3413) | May 29, 2026 |
| 1321 | 棋盘问题 | 44%(60913/135974) | Jun 4, 2026 |
| 1322 | Chocolate | 26%(3518/13461) | May 29, 2026 |
| 1323 | Game Prediction | 47%(6222/13017) | May 29, 2026 |
| 1324 | Holedox Moving | 24%(5532/22364) | May 29, 2026 |
| 1325 | Machine Schedule | 40%(8998/22047) | Jun 4, 2026 |
| 1326 | Mileage Bank | 41%(6359/15235) | May 29, 2026 |
| 1327 | Moving Object Recognition | 56%(352/620) | May 29, 2026 |
| 1328 | Radar Installation | 22%(40084/175119) | Jun 4, 2026 |
| 1329 | Circle Through Three Points | 38%(1974/5064) | May 29, 2026 |
| 1330 | Nearest Common Ancestors | 47%(22900/48101) | Jun 3, 2026 |
| 1331 | Multiply | 51%(3321/6410) | May 29, 2026 |
| 1332 | Finding Liars | 42%(721/1709) | May 29, 2026 |
| 1333 | Christmas Gifts | 26%(66/252) | May 6, 2026 |
| 1334 | Two Mountaineers | 39%(185/474) | Jun 2, 2026 |
| 1335 | Digital Onion | 26%(146/545) | May 29, 2026 |
| 1336 | The K-League | 35%(323/922) | May 29, 2026 |
| 1337 | A Lazy Worker | 34%(476/1379) | May 29, 2026 |
| 1338 | Ugly Numbers | 41%(13620/32564) | May 29, 2026 |
| 1339 | poker card game | 34%(374/1075) | Jun 2, 2026 |
| 1340 | The Longest Detour Problem | 33%(232/699) | Jun 2, 2026 |
| 1341 | The Strongest Subchains | 22%(182/823) | Jun 2, 2026 |
| 1342 | Tag Trees | 26%(117/442) | Jun 2, 2026 |
| 1343 | Rooted Trees Isomorphism | 27%(181/657) | Jun 2, 2026 |
| 1344 | Tree Size Problem | 53%(283/530) | Jun 2, 2026 |
| 1345 | Address Recovery | 5%(9/176) | May 7, 2026 |
| 1346 | Board of Directors Meeting | 13%(20/145) | May 29, 2026 |
| 1347 | Triangle | 18%(79/420) | Mar 22, 2026 |
| 1348 | Computing | 16%(318/1959) | Jun 4, 2026 |
| 1349 | Coding of Permutations | 41%(446/1087) | Jun 4, 2026 |
| 1350 | Cabric Number Problem | 30%(3707/12188) | Jun 4, 2026 |
| 1351 | Number of Locks | 49%(866/1755) | Jun 4, 2026 |
| 1352 | Quantity of White Mice | 28%(170/590) | Jun 4, 2026 |
| 1353 | Color Change of Go Game Pieces | 60%(362/597) | Jun 4, 2026 |
| 1354 | Placement of Keys | 51%(939/1841) | Jun 4, 2026 |
| 1355 | Selecting the Optimal Teaching Fiends | 14%(171/1189) | Jun 4, 2026 |
| 1356 | Grandpa's Other Estate | 45%(283/626) | Jun 4, 2026 |
| 1357 | Afshung Pizza Delivery | 31%(63/197) | Jun 2, 2026 |
| 1358 | Housing Complexes | 36%(152/416) | Jun 4, 2026 |
| 1359 | Spacecraft Malfunction | 36%(195/537) | Jun 4, 2026 |
| 1360 | Blue x Red = Bang | 9%(30/321) | May 29, 2026 |
| 1361 | JaWs | 15%(32/206) | Jun 2, 2026 |
| 1362 | Skew Binary | 54%(410/759) | Jun 4, 2026 |
| 1363 | Rails | 37%(19971/53647) | Jun 4, 2026 |
| 1364 | King | 34%(5863/17207) | May 4, 2026 |
| 1365 | Prime Land | 43%(2547/5800) | Jun 4, 2026 |
| 1366 | Word | 26%(257/974) | Jun 4, 2026 |
| 1367 | Time | 27%(191/699) | Jun 4, 2026 |
| 1368 | Puzzle | 19%(159/800) | Jun 4, 2026 |
| 1369 | Append | 24%(136/559) | Jun 4, 2026 |
| 1370 | Gossiping | 34%(202/588) | Jun 4, 2026 |
| 1371 | Tin Cutter | 33%(291/871) | Jun 4, 2026 |
| 1372 | FORCAL | 23%(98/415) | Jun 2, 2026 |
| 1373 | L-system | 12%(154/1199) | Jun 3, 2026 |
| 1374 | Crosswords | 29%(178/596) | Jun 4, 2026 |
| 1375 | Intervals | 29%(1593/5324) | Jun 4, 2026 |
| 1376 | Robot | 32%(3531/10711) | Jun 4, 2026 |
| 1377 | Good Approximation Problem | 23%(253/1082) | Jun 4, 2026 |
| 1378 | Power Cable Problem | 45%(193/428) | Jun 4, 2026 |
| 1379 | Run Away | 29%(3544/12195) | Jun 3, 2026 |
| 1380 | Equipment Box | 26%(1195/4514) | Mar 26, 2026 |
| 1381 | Secret Code | 33%(308/919) | Mar 26, 2026 |
| 1382 | The Proper Key | 34%(235/675) | Mar 5, 2026 |
| 1383 | Labyrinth | 35%(2393/6722) | May 22, 2026 |
| 1384 | Piggy-Bank | 50%(10130/20182) | Jun 4, 2026 |
| 1385 | Lifting the Stone | 31%(1398/4494) | May 25, 2026 |
| 1386 | Play on Words | 32%(5928/18361) | May 8, 2026 |
| 1387 | The Constraint Densest Submatrix | 23%(277/1155) | Jun 4, 2026 |
| 1388 | Hinge Node Problem | 61%(348/566) | Jun 4, 2026 |
| 1389 | Area of Simple Polygons | 51%(2127/4128) | Jun 4, 2026 |
| 1390 | Blocks | 40%(3257/8005) | Jun 4, 2026 |
| 1391 | Erdos Numbers | 25%(458/1782) | Dec 9, 2025 |
| 1392 | Ouroboros Snake | 49%(823/1649) | Jun 4, 2026 |
| 1393 | Fold-up Patterns | 25%(40/159) | Jun 4, 2026 |
| 1394 | Railroad | 30%(415/1359) | Jun 4, 2026 |
| 1395 | Cog-Wheels | 12%(285/2357) | May 7, 2026 |
| 1396 | Simple Arithmetics | 23%(554/2388) | May 7, 2026 |
| 1397 | The Bulk | 38%(95/244) | Mar 4, 2026 |
| 1398 | Complete the sequence! | 48%(561/1156) | Oct 14, 2025 |
| 1399 | Direct Visibility | 41%(161/388) | Mar 21, 2026 |
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