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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 |
| 1225 | STRICTLY INSCRIBED SIMILAR TRIANGLES | 19%(37/189) | Aug 1, 2026 |
| 1210 | City Directions | 11%(37/327) | Aug 1, 2026 |
| 1268 | Forests | 18%(51/278) | Aug 2, 2026 |
| 1232 | Microfiches | 17%(61/350) | Aug 1, 2026 |
| 1253 | Markov Trains | 13%(72/516) | Aug 2, 2026 |
| 1272 | Synchronous Design | 21%(95/447) | Aug 8, 2026 |
| 1246 | Hilbert Curve Intersections | 26%(98/376) | Aug 8, 2026 |
| 1233 | Street Crossing | 16%(104/618) | Aug 1, 2026 |
| 1224 | PICTURE PUZZLE | 22%(107/477) | Sep 1, 2026 |
| 1249 | Oil Pipeline | 25%(114/446) | Aug 13, 2026 |
| 1223 | DEHUFF | 31%(115/366) | Aug 1, 2026 |
| 1212 | Eeny Meeny | 30%(119/391) | Aug 1, 2026 |
| 1235 | Galactic Breakup | 34%(133/389) | Aug 1, 2026 |
| 1203 | Timetable | 22%(141/625) | Jul 19, 2026 |
| 1294 | Not Too Convex Hull | 21%(143/657) | Aug 8, 2026 |
| 1202 | Family | 17%(154/897) | Aug 1, 2026 |
| 1257 | Cross-stitch. | 32%(158/481) | Aug 2, 2026 |
| 1296 | Noise Effect | 39%(159/404) | Aug 8, 2026 |
| 1261 | Huffman Trees | 16%(164/965) | Aug 2, 2026 |
| 1278 | BOAT | 27%(172/627) | Aug 8, 2026 |
| 1216 | Simulation Wizardry | 53%(186/350) | Jul 19, 2026 |
| 1209 | Calendar | 17%(189/1069) | Aug 1, 2026 |
| 1288 | Sly Number | 36%(190/523) | Aug 8, 2026 |
| 1295 | I hate SPAM, but some people love it | 43%(191/437) | Aug 8, 2026 |
| 1213 | Roman Numerals | 48%(207/425) | Aug 1, 2026 |
| 1206 | Servers | 25%(207/797) | Aug 1, 2026 |
| 1255 | Floors | 35%(214/602) | Aug 2, 2026 |
| 1267 | Fence | 23%(223/949) | Aug 2, 2026 |
| 1242 | Plugged In | 44%(227/515) | Aug 1, 2026 |
| 1211 | Traffic Lights | 32%(229/696) | Sep 5, 2026 |
| 1280 | Game | 32%(231/718) | Aug 8, 2026 |
| 1227 | RoboContest | 33%(231/697) | Sep 5, 2026 |
| 1215 | Gondwanaland Telecom | 31%(236/751) | Sep 5, 2026 |
| 1290 | Grandpa's Rubik Cube | 51%(237/458) | Sep 5, 2026 |
| 1219 | L-I-N-G-O: LINGO | 21%(262/1226) | Sep 5, 2026 |
| 1238 | Arbitrage | 30%(282/915) | Aug 1, 2026 |
| 1277 | Beer Land | 46%(317/682) | Aug 29, 2026 |
| 1262 | Input | 42%(358/839) | Aug 28, 2026 |
| 1266 | Cover an Arc. | 38%(375/970) | Aug 29, 2026 |
| 1229 | Wild Domains | 33%(417/1230) | Aug 29, 2026 |
| 1282 | 庆典的日期 | 14%(421/2910) | Aug 29, 2026 |
| 1271 | Nice Milk | 22%(482/2154) | Sep 5, 2026 |
| 1259 | The Picnic | 29%(507/1732) | Aug 29, 2026 |
| 1217 | FOUR QUARTERS | 39%(524/1338) | Aug 13, 2026 |
| 1245 | Programmer, Rank Thyself | 35%(530/1478) | Aug 1, 2026 |
| 1264 | SCUD Busters | 40%(559/1387) | Aug 27, 2026 |
| 1263 | Reflections | 40%(572/1407) | Aug 2, 2026 |
| 1241 | Knockout Tournament | 59%(587/992) | Aug 9, 2026 |
| 1234 | Ball Toss | 42%(599/1398) | Aug 9, 2026 |
| 1291 | This Sentence is False | 44%(599/1332) | Aug 13, 2026 |
| 1292 | Will Indiana Jones Get There? | 26%(619/2364) | Aug 15, 2026 |
| 1237 | The Postal Worker Rings Once | 54%(620/1142) | Aug 13, 2026 |
| 1289 | The Cat in the Hat | 35%(657/1864) | Aug 9, 2026 |
| 1205 | Water Treatment Plants | 53%(662/1236) | Aug 9, 2026 |
| 1214 | "Accordian" Patience | 27%(665/2412) | Aug 15, 2026 |
| 1297 | Supermarket | 36%(686/1892) | Aug 10, 2026 |
| 1285 | Combinations, Once Again | 33%(726/2150) | Aug 10, 2026 |
| 1231 | The Alphabet Game | 41%(755/1826) | Aug 9, 2026 |
| 1244 | Slots of Fun | 58%(775/1336) | Aug 8, 2026 |
| 1293 | Duty Free Shop | 38%(868/2263) | Aug 8, 2026 |
| 1254 | Hansel and Grethel | 44%(1056/2367) | Aug 2, 2026 |
| 1283 | Moving Computer | 43%(1288/2950) | Aug 22, 2026 |
| 1299 | Polar Explorer | 34%(1545/4505) | Aug 8, 2026 |
| 1281 | MANAGER | 34%(1619/4736) | Aug 23, 2026 |
| 1240 | Pre-Post-erous! | 60%(1779/2934) | Aug 7, 2026 |
| 1243 | One Person | 64%(1885/2917) | Aug 1, 2026 |
| 1248 | Safecracker | 49%(2061/4135) | Aug 8, 2026 |
| 1252 | Euro Efficiency | 41%(2183/5198) | Aug 7, 2026 |
| 1239 | Increasing Sequences | 42%(2230/5237) | Aug 17, 2026 |
| 1221 | UNIMODAL PALINDROMIC DECOMPOSITIONS | 49%(2977/6063) | Aug 1, 2026 |
| 1220 | NUMBER BASE CONVERSION | 45%(3318/7361) | Aug 1, 2026 |
| 1270 | Following Orders | 39%(3618/9140) | Aug 29, 2026 |
| 1265 | Area | 38%(3966/10262) | Sep 4, 2026 |
| 1284 | Primitive Roots | 57%(4094/7112) | Aug 8, 2026 |
| 1279 | Art Gallery | 37%(4382/11757) | Sep 4, 2026 |
| 1230 | Pass-Muraille | 31%(4408/13994) | Aug 4, 2026 |
| 1286 | Necklace of Beads | 38%(4803/12369) | Aug 13, 2026 |
| 1275 | Cashier Employment | 38%(4923/12800) | Aug 18, 2026 |
| 1250 | Tanning Salon | 52%(4974/9465) | Aug 1, 2026 |
| 1247 | Magnificent Meatballs | 64%(5144/8004) | Aug 1, 2026 |
| 1204 | Word Puzzles | 37%(5234/13856) | Aug 5, 2026 |
| 1228 | Grandpa's Estate | 27%(5269/18930) | Aug 5, 2026 |
| 1208 | The Blocks Problem | 40%(5996/14692) | Jul 19, 2026 |
| 1226 | Substrings | 34%(6056/17400) | Jul 19, 2026 |
| 1260 | Pearls | 49%(6779/13628) | Sep 1, 2026 |
| 1200 | Crazy Search | 26%(10670/40201) | Aug 5, 2026 |
| 1269 | Intersecting Lines | 40%(10685/26372) | Sep 3, 2026 |
| 1222 | EXTENDED LIGHTS OUT | 58%(10834/18392) | Aug 22, 2026 |
| 1256 | Anagram | 39%(12305/30859) | Aug 2, 2026 |
| 1236 | Network of Schools | 38%(13185/33866) | Aug 16, 2026 |
| 1274 | The Perfect Stall | 43%(14702/33952) | Aug 8, 2026 |
| 1201 | Intervals | 36%(15797/42716) | Sep 5, 2026 |
| 1298 | The Hardest Problem Ever | 52%(16194/30961) | Sep 1, 2026 |
| 1287 | Networking | 50%(16211/32223) | Aug 31, 2026 |
| 1218 | THE DRUNK JAILER | 59%(19475/32663) | Aug 24, 2026 |
| 1276 | Cash Machine | 37%(20858/56087) | Sep 4, 2026 |
| 1207 | The 3n + 1 problem | 30%(22440/72848) | Aug 24, 2026 |
| 1251 | Jungle Roads | 47%(22473/47730) | Aug 11, 2026 |
| 1258 | Agri-Net | 40%(38226/94323) | Sep 3, 2026 |
| 1273 | Drainage Ditches | 39%(39227/99888) | Sep 4, 2026 |
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