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Title or Source
Problem ID
Problem IDTitleRatio(AC/Submit)DifficultyDate
23001.1.1Your Ride Is Here 你的飞碟在这儿! 67%(156/233)33%2019-01-26
23011.1.2 Greedy Gift Givers 贪婪的送礼者 52%(129/249)48%2019-01-19
23021.1.3 Friday the Thirteenth 黑色星期五 67%(98/147)33%2018-09-15
23031.1.4 Broken Necklace 39%(59/150)61%2018-09-25
23041.2.1 Milking Cows 挤牛奶 19%(110/570)81%2019-02-09
23051.2.2 Transformations 方块转换 36%(71/197)64%2018-11-20
23061.2.3 Name That Number 命名那个数字 19%(40/216)81%2018-10-25
23071.2.4 Palindromic Squares 回文平方数 47%(66/139)53%2018-09-16
23081.2.5 Dual Palindromes 双重回文数 51%(63/124)49%2018-09-27
23091.3.1 Mixing Milk 混合牛奶 65%(70/107)35%2019-01-21
23101.3.2 Barn Repair 修理牛棚 47%(66/141)53%2018-10-11
23111.3.3 Calf Flac 19%(45/239)81%2018-10-22
23121.3.4 Prime Cryptarithm 牛式 50%(50/101)50%2019-01-15
23131.4.1 Packing Rectangles 铺放矩形块 (IOI 95) 62%(5/8)38%2017-06-22
23141.4.2 The Clocks 时钟 (IOI'94 - Day 2) 23%(17/74)77%2018-10-02
23151.4.3 Arithmetic Progressions 等差数列 17%(19/113)83%2018-09-27
23161.4.4 Mother's Mil 母亲的牛奶 43%(48/112)57%2018-10-01
23171.5.1 Number Triangles 数字金字塔 66%(83/125)34%2019-01-30
23181.5.2 Prime Palindromes 回文质数 18%(69/389)82%2018-10-29
23191.5.3 Superprime Rib 特殊的质数肋骨 53%(56/106)47%2018-09-29
23201.5.4 Checker Challenge跳棋的挑战 39%(29/75)61%2018-09-29
23212.1.2 Ordered Fractions 顺序的分数 49%(62/127)51%2019-01-24
23222.1.3 Sorting a Three-Valued Sequence 三值的排序 42%(83/196)58%2018-09-17
23232.1.4 Healthy Holsteins 健康的好斯坦奶牛 39%(19/49)61%2018-12-12
23242.1.5 Hamming Codes 海明码 46%(18/39)54%2018-12-14
23252.2.1 Preface Numbering 序言页码 56%(15/27)44%2018-09-10
23262.2.2 Subset Sums 集合 36%(25/69)64%2018-10-16
23272.2.3 Runaround Numbers 循环数 44%(28/63)56%2018-10-02
23282.2.4 Party Lamps 派对灯 50%(22/44)50%2018-09-14
23292.3.1 Longest Prefix 最长前缀 17%(7/42)83%2018-09-19
23302.3.2 Cow Pedigrees 奶牛家谱 39%(7/18)61%2018-10-02
23312.3.3 Zero Sum 和为零 63%(32/51)37%2018-10-03
23322.3.4 Money Systems 货币系统 34%(30/89)66%2018-09-28
23332.3.5 Controlling Companies 控制公司 33%(20/61)67%2018-09-29
23342.4.1 The Tamworth Two 两只塔姆沃斯牛 75%(15/20)25%2018-09-22
23352.4.2 Overfencing 穿越栅栏 24%(9/37)76%2018-09-18
23362.4.3 Cow Tours 牛的旅行 33%(6/18)67%2015-04-03
23372.4.4 Bessie Come Home 回家 40%(22/55)60%2018-09-30
23382.4.5 Fractions to Decimals 分数化小数 25%(14/56)75%2018-10-04
23393.1.1 Agri-Net 最短网络 74%(70/94)26%2018-09-30
23403.1.2 Score Inflation 总分 33%(62/190)67%2018-10-03
23413.1.3 Humble Numbers 丑数 27%(11/41)73%2015-08-19
23423.1.4 Shaping Regions 形成的区域 18%(5/28)82%2015-04-23
23433.1.5 Contact 联系 38%(9/24)62%2018-09-29
23443.1.6 Stamps 邮票 24%(7/29)76%2018-09-19
23453.2.1 Factorials 阶乘 47%(617/1304)53%2018-11-09
23463.2.2 Stringsobits 01串 38%(18/48)62%2018-03-28
23473.2.3 Spinning Wheels 纺车的轮子 100%(6/6)0%2015-05-04
23483.2.4 Feed Ratios 饲料调配 25%(5/20)75%2018-09-06
23493.2.5 Magic Squares 魔板 27%(9/33)73%2018-11-06
23503.2.6 Sweet Butter 香甜的黄油 22%(8/36)78%2018-09-26
23513.3.1 Riding the Fences 骑马修栅栏 34%(20/58)66%2018-10-09
23523.3.2 Shopping Offers 商店购物 67%(4/6)33%2013-10-12
23533.3.3 Camelot 亚瑟王的宫殿 0%(0/18)100%2013-09-19
23543.3.4 Home on the Range 家的范围 45%(5/11)55%2013-07-16
23553.3.5 A Game 游戏 55%(6/11)45%2015-05-18
23563.4.1 Closed Fences 闭合的栅栏 20%(1/5)80%2013-10-03
23573.4.2 American Heritage 美国血统 数据结构73%(11/15)27%2018-09-17
23583.4.3 Electric Fence 电网 60%(6/10)40%2013-07-16
23593.4.4 Raucous Rockers “破锣摇滚”乐队 60%(6/10)40%2013-07-22
23604.1.1 Beef McNuggets 麦香牛块 57%(4/7)43%2013-07-15
23614.1.2 Fence Rails 栅栏的木料 29%(4/14)71%2018-06-14
23624.1.3 Fence Loops 篱笆回路 29%(2/7)71%2018-07-20
23634.1.4 Cryptcowgraphy 解密牛语 6%(1/16)94%2016-03-21
23644.2.1 Drainage Ditches 草地排水 59%(10/17)41%2018-01-17
23654.2.2 The Perfect Stall 完美的牛栏 83%(10/12)17%2018-09-29
23664.2.3 Job Processing 工序安排 60%(3/5)40%2013-11-02
23674.2.4 Cowcycles 奶牛自行车 0%(0/2)100%2013-10-29
23684.3.1 Buy Low, Buy Lower 逢低吸纳 17%(4/23)83%2013-11-09
23694.3.2 The Primes 素数方阵 14%(2/14)86%2013-10-09
23704.3.3 Street Race 街道赛跑 100%(2/2)0%2013-10-07
23714.3.4 Letter Game 字母游戏 29%(2/7)71%2013-10-07
23724.4.1 Shuttle Puzzle 棋盘游戏 33%(1/3)67%2013-11-10
23734.4.2 Pollutant Control 追查坏牛奶 25%(4/16)75%2013-10-13
23744.4.3 Frame Up 重叠的图像 60%(3/5)40%2013-11-04
23755.1.1 Fencing the Cows 圈奶牛 60%(3/5)40%2013-10-04
23765.1.2 Starry Night 夜空繁星 100%(1/1)0%2013-10-14
23775.1.3 Musical Themes 乐曲主题 40%(2/5)60%2013-10-06
23785.2.1 Snail Trails 蜗牛的旅行 41%(7/17)59%2013-07-18
23795.2.2 Electric Fences 电网 53%(9/17)47%2013-10-06
23805.2.3 Wisconsin Squares 威斯康星州的牧场 0%(0/4)100%2013-10-07
23815.3.1 Milk Measuring 量取牛奶 6%(1/17)94%2014-09-15
23825.3.2 Window Area 窗体面积 40%(2/5)60%2013-10-04
23835.3.3 Network of Schools 校园网 44%(4/9)56%2013-11-07
23845.3.4 Big Barn 巨大的牛棚 29%(2/7)71%2013-10-15
23855.4.1 All Latin Squares 拉丁正方形 62%(5/8)38%2013-10-27
23865.4.2 Canada Tour 周游加拿大 27%(3/11)73%2013-10-11
23875.4.3 Character Recognition 字符识别 0%(0/8)100%2019-01-09
23885.4.4 Betsy's Tour 漫游小镇 14%(22/162)86%2018-09-16
23895.4.5 Telecowmunication 奶牛的电信 75%(3/4)25%2017-06-22
23905.5.1 Picture 矩形周长 40%(2/5)60%2014-11-12
23915.5.2 Hidden Password 隐藏口令 25%(1/4)75%2013-10-17
23925.5.3 Towfive 二五语言 0%(0/0)100%2010-10-02
23932.1.1The Castle城堡 43%(13/30)57%2015-07-29

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