ID Problem Show tags Hide tags AC / Tried Difficulty
90 P1090   [NOIP 2004 提高组] 合并果子 37 / 67 5
118 P1118   [USACO06FEB] Backward Digit Sums G/S 2 / 3 5
134 P1134   [USACO3.2] 阶乘问题 2 / 2 5
200 P1200   [USACO1.1] 你的飞碟在这儿 Your Ride Is Here 41 / 50 1
201 P1201   [USACO1.1] 贪婪的送礼者 Greedy Gift Givers 4 / 6 3
202 P1202   [USACO1.1] 黑色星期五 Friday the Thirteenth 1 / 1 3
203 P1203   [USACO1.1] 坏掉的项链 Broken Necklace 1 / 1 3
204 P1204   [USACO1.2] 挤牛奶 Milking Cows 1 / 1 3
205 P1205   [USACO1.2] 方块转换 Transformations 2 / 2 5
206 P1206   [USACO1.2] 回文平方数 Palindromic Squares 0 / 0 3
207 P1207   [USACO1.2] 双重回文数 Dual Palindromes 0 / 0 3
208 P1208   [USACO1.3] 混合牛奶 Mixing Milk 11 / 14 3
209 P1209   [USACO1.3] 修理牛棚 Barn Repair 2 / 2 5
210 P1210   [USACO1.3] 最长的回文 Calf Flac 1 / 2 5
211 P1211   [USACO1.3] 牛式 Prime Cryptarithm 0 / 0 3
212 P1212   [USACO1.4] 铺放矩形块 Packing Rectangles 0 / 0 6
213 P1213   [IOI 1994 / USACO1.4] 时钟 The Clocks 1 / 1 6
214 P1214   [USACO1.4] 等差数列 Arithmetic Progressions 0 / 0 6
215 P1215   [USACO1.4] 母亲的牛奶 Mother's Milk 0 / 0 5
216 P1216   [IOI 1994 / USACO1.5] 数字三角形 Number Triangles 14 / 21 3
217 P1217   [USACO1.5] 回文质数 Prime Palindromes 1 / 1 3
218 P1218   [USACO1.5] 特殊的质数肋骨 Superprime Rib 0 / 0 3
219 P1219   [USACO1.5] 八皇后 Checker Challenge 31 / 107 5
336 P1339   [USACO09OCT] Heat Wave G 3 / 3 5
341 P1344   [USACO4.4] 追查坏牛奶 Pollutant Control 1 / 9 8
342 P1345   [USACO5.4] 奶牛的电信 Telecowmunication 0 / 0 7
350 P1353   [USACO08JAN] Running S 0 / 0 6
357 P1360   [USACO07MAR] Gold Balanced Lineup G 0 / 0 7
372 P1376   [USACO05MAR] Yogurt factory 机器工厂 0 / 0 3
438 P1444   [USACO1.3] 虫洞 wormhole 1 / 1 5
446 P1452   【模板】旋转卡壳 / [USACO03FALL] Beauty Contest G 1 / 1 8
451 P1457   [USACO2.1] 城堡 The Castle 1 / 1 7
452 P1458   [USACO2.1] 顺序的分数 Ordered Fractions 1 / 1 3
453 P1459   [IOI 1996 / USACO2.1] 三值的排序 Sorting a Three-Valued Sequence 0 / 0 3
454 P1460   [USACO2.1] 健康的荷斯坦奶牛 Healthy Holsteins 2 / 2 3
455 P1461   [USACO2.1] 海明码 Hamming Codes 0 / 0 5
459 P1465   [USACO2.2] 序言页码 Preface Numbering 1 / 4 5
460 P1466   [USACO2.2] 集合 Subset Sums 1 / 2 5
461 P1467   [USACO2.2] 循环数 Runaround Numbers 0 / 0 3
462 P1468   [IOI 1998 / USACO2.2] 派对灯 Party Lamps 0 / 0 6
464 P1470   [IOI 1996 / USACO2.3] 最长前缀 Longest Prefix 1 / 1 6
465 P1472   [USACO2.3] 奶牛家谱 Cow Pedigrees 0 / 0 7
466 P1473   [USACO2.3] 零的数列 Zero Sum 1 / 2 5
467 P1474   [USACO2.3] Money System / [USACO07OCT] Cow Cash G 1 / 2 5
468 P1475   [USACO2.3] 控制公司 Controlling Companies 0 / 0 5
511 P1518   [USACO2.4] 两只塔姆沃斯牛 The Tamworth Two 1 / 1 5
512 P1519   [USACO2.4] 穿越栅栏 Overfencing 0 / 0 5
515 P1522   [USACO2.4] 牛的旅行 Cow Tours 1 / 2 6
522 P1529   [USACO2.4] 回家 Bessie Come Home 1 / 1 5
523 P1530   [USACO2.4] 分数化小数 Fractions to Decimals 1 / 1 5
528 P1535   [USACO08MAR] Cow Travelling S 0 / 0 5
8401 P1545   [USACO04DEC] Dividing the Path G 0 / 0 7
538 P1546   [USACO3.1] 最短网络 Agri-Net 1 / 1 5
539 P1547   [USACO05MAR] Out of Hay S 0 / 0 5
542 P1550   [USACO08OCT] Watering Hole G 0 / 0 5
546 P1554   [USACO06DEC] 梦中的统计 Dream Counting B 39 / 91 1
547 P1555   [USACO11NOV] 尴尬的数字 Awkward Digits B 1 / 1 5
548 P1556   [USACO12MAR] 幸福的路 Connect the Cows B 0 / 0 6
549 P1557   Kruscal的加法 1 / 1 6
552 P1560   [USACO5.2] 蜗牛的旅行Snail Trails 0 / 0 7
553 P1561   [USACO12JAN] Mountain Climbing S 0 / 0 8
561 P1569   [USACO ?] Generic Cow Protests【来源请求】 0 / 0 3
570 P1578   [WC2002] 奶牛浴场 0 / 0 7
580 P1588   [USACO07OPEN] Catch That Cow S 0 / 0 3
588 P1596   [USACO10OCT] Lake Counting S 24 / 90 3
591 P1599   [USACO09MAR] 结算日 Payback B 1 / 8 3
597 P1605   迷宫 1 / 2 3
598 P1606   [USACO07FEB] Lilypad Pond G 0 / 0 8
599 P1607   [USACO09FEB] Fair Shuttle G 0 / 0 7
630 P1638   逛画展 9 / 31 5
9470 P1639   [USACO18FEB] Teleportation B 8 / 26 1
640 P1649   [USACO07OCT] Obstacle Course S 0 / 0 5
8402 P1653   [USACO04DEC] Cow Ski Area G 0 / 0 6
8403 P1668   [USACO04DEC] Cleaning Shifts S 0 / 0 6
8404 P1669   [USACO04DEC] Bad Cowtractors S 0 / 0 5
8405 P1670   [USACO04DEC] Tree Cutting S 0 / 0 6
8406 P1671   [USACO05FEB] Rigging the Bovine Election S 0 / 0 5
8407 P1672   [USACO05FEB] Feed Accounting S 0 / 0 5
8408 P1673   [USACO05FEB] Part Acquisition S 0 / 0 5
8409 P1674   [USACO05FEB] Secret Milking Machine G 0 / 0 8
8410 P1675   [USACO05FEB] Jersey Politics G 0 / 0 7
8411 P1676   「CMOI R0」Parallel Universe Shifter / Lattices in Circle 0 / 0 9
9471 P1677   [USACO18FEB] Hoofball B 0 / 0 3
9359 P1693   [USACO19FEB] Sleepy Cow Herding B 0 / 0 3
9360 P1694   [USACO19FEB] The Great Revegetation B 0 / 0 5
9378 P1695   [USACO19FEB] Measuring Traffic B 0 / 0 3
9410 P1696   [USACO18JAN] Blocked Billboard II B 0 / 0 3
9411 P1697   [USACO18JAN] Lifeguards B 0 / 0 1
9646 P1698   [USACO18JAN] Out of Place B 0 / 0 3
9407 P1699   [USACO19OPEN] Bucket Brigade B 0 / 0 3
9408 P1700   [USACO19OPEN] Milk Factory B 0 / 0 3
9409 P1701   [USACO19OPEN] Cow Evolution B 0 / 0 5
678 P1709   [USACO5.5] 隐藏口令 Hidden Password 1 / 1 7
9472 P1711   [USACO18FEB] Taming the Herd B 0 / 0 3
683 P1715   [USACO16DEC] Lots of Triangles P 0 / 0 7
714 P1748   H 数 2 / 2 5
779 P1821   [USACO07FEB] Cow Party S 1 / 1 5
782 P1824   [USACO05FEB] 进击的奶牛 Aggressive Cows G 6 / 6 3
783 P1825   [USACO11OPEN] Corn Maze S 5 / 21 5
785 P1827   [USACO3.4] 美国血统 American Heritage 0 / 0 3

Categories

Lucky

Pick a problem randomly based on the current filter.