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Title or Source
Problem ID
Problem IDTitleRatio(AC/Submit)DifficultyDate
1000A+B Problem POJ64%(4449/7002)36%2021-02-26
1001Hello, world! 26%(831/3137)74%2021-02-17
1002用筛法求之N内的素数。(程序填空) 25%(894/3637)75%2021-01-31
1003A+B for Input-Output Practice (I) 67%(3439/5106)33%2021-02-26
1004A+B for Input-Output Practice (II) 62%(2868/4596)38%2021-02-26
1005A+B for Input-Output Practice (III) 53%(2285/4316)47%2021-02-26
1006A+B for Input-Output Practice (IV) 57%(2116/3688)43%2021-02-15
1007A+B for Input-Output Practice (V) 67%(1983/2965)33%2021-01-31
1008A+B for Input-Output Practice (VI) 60%(1760/2938)40%2021-01-31
1009A+B for Input-Output Practice (VII) 57%(1929/3383)43%2021-01-31
1010A+B for Input-Output Practice (VIII) 69%(1955/2842)31%2021-01-31
1011字符逆序 57%(2625/4627)43%2021-02-01
1012字符串的输入输出处理 32%(1067/3290)68%2021-01-31
1013The 3n + 1 problem 32%(260/815)68%2021-01-31
1014Minesweeper UVA toolkit30%(98/327)70%2021-02-01
1015蛇行矩阵 38%(259/684)62%2021-02-04
1016The Trip Waterloo Local Contest Jan. 31, 199935%(57/165)65%2020-10-30
1017LC-Display Mid-Central European Regional Contest 199935%(25/72)65%2020-11-02
1018Graphical Editor 35%(20/57)65%2020-11-24
1019Interpreter Waterloo local 2000.09.3016%(16/99)84%2020-11-06
1020Check The Check Waterloo Local Contest Oct. 17, 199827%(21/77)73%2020-11-18
1021Australian Voting Waterloo Local Contest Oct. 17, 199826%(14/53)74%2020-11-20
1022Jolly Jumpers Waterloo local 2000.09.3031%(28/89)69%2020-11-25
1023Poker Hands University of Waterloo Local Contest 1998.06.0623%(14/61)77%2018-10-25
1024Hartals 52%(16/31)48%2019-12-28
1025Crypt Kicker University of Waterloo Local Contest 1998.06.060%(0/41)100%2021-01-03
1026Stack 'em Up Waterloo local 2001.09.2919%(11/59)81%2020-11-26
1027Erdös Numbers Mid-Central European Regional Contest 20004%(1/26)96%2018-07-09
1028Contest Scoreboard University of Waterloo Local Contest 1998.06.060%(0/100)100%2018-11-09
1029Yahtzee Waterloo Local Contest Oct. 17, 199840%(2/5)60%2019-12-28
1030WERTYU Waterloo local 2001.01.2764%(29/45)36%2020-10-12
1031Where's Waldorf? 63%(12/19)37%2019-12-29
1032Common Permutation the University of Alberta 1999 68%(30/44)32%2019-12-29
1033Crypt Kicker II Waterloo Local Contest Oct. 4, 199811%(10/91)89%2020-01-02
1034Automated Judge Script 65%(22/34)35%2019-03-22
1035File Fragmentation Waterloo Local Contest Oct. 7, 199737%(10/27)63%2017-07-19
1036Doublets Waterloo Local Contest Jan. 31, 19990%(0/21)100%2020-10-06
1037Fmt 40%(2/5)60%2017-07-22
1038Vito UVA toolkit40%(12/30)60%2020-11-26
1039Stacks of Flapjacks 52%(12/23)48%2019-02-21
1040Bridge Waterloo local 2000.09.302%(1/59)98%2019-12-21
1041Longest Nap 79%(11/14)21%2018-07-14
1042Shoemaker's Problem 71%(12/17)29%2020-11-25
1043CDVII Waterloo Local Contest Jan. 31, 19990%(0/2)100%2017-07-24
1044ShellSort 60%(3/5)40%2020-11-25
1045Football (aka Soccer) 69%(9/13)31%2019-11-12
1046Primary Arithmetic Waterloo local 2000.09.2327%(17/62)73%2020-12-03
1047Reverse and Add 83%(10/12)17%2018-12-20
1048The Archeologists' Dilemma 100%(2/2)0%2017-11-04
1049Ones Waterloo local 2001.06.0267%(20/30)33%2020-11-01
1050A multiplication game Waterloo local 2001.09.2267%(6/9)33%2019-03-23
1051Polynomial coefficients 56%(5/9)44%2017-11-04
1052The Stern-Brocot Number System 62%(13/21)38%2017-11-04
1053Pairsumonious Numbers Waterloo local 2001.09.290%(0/5)100%2010-10-20
1054How many Fibs? Ulm Local 200024%(5/21)76%2017-12-02
1055How Many Pieces of Land? 100%(1/1)0%2019-08-09
1056Counting 100%(6/6)0%2017-12-19
1057Expressions 100%(1/1)0%2017-06-29
1058Complete Tree labeling 100%(1/1)0%2018-11-13
1059The Priest Mathematician 11%(1/9)89%2018-11-13
1060Self-describing Sequence 12%(2/16)88%2012-01-30
1061Steps Waterloo local 2000.01.2986%(6/7)14%2019-10-19
1062Light, more light 90%(26/29)10%2019-12-07
1063Carmichael Numbers UVA toolkit47%(8/17)53%2018-04-17
1064Euclid problem 71%(12/17)29%2020-11-25
1065Factovisors Waterloo Local Contest Jan. 31, 199920%(2/10)80%2012-02-04
1066Summation of Four Primes 0%(0/15)100%2019-01-25
1067Smith Numbers Mid-Central European Regional Contest 200039%(11/28)61%2017-11-04
1068Marbles 100%(1/1)0%2012-02-06
1069Repackaging 0%(0/0)100%2010-07-15
1070Little Bishops UVA toolkit29%(23/79)71%2017-11-04
107115-Puzzle Problem UVA toolkit0%(0/20)100%2019-07-09
1072Queue 67%(2/3)33%2019-11-21
1073Servicing Stations UVA toolkit25%(2/8)75%2017-07-27
1074Tug of War Waterloo local 2000.09.3026%(5/19)74%2019-08-09
1075Garden of Eden 100%(3/3)0%2020-11-27
1076Color Hash 50%(1/2)50%2020-11-27
1077Bigger Square Please... 0%(0/0)100%2010-07-15
1078Bicoloring 60%(9/15)40%2017-11-04
1079Playing with Wheels 80%(4/5)20%2017-11-04
1080The Tourist Guide 64%(7/11)36%2017-11-04
1081Slash Maze Mid-Central European Regional Contest 199975%(3/4)25%2017-11-04
1082Edit Step Ladders Waterloo local 2000.09.230%(0/4)100%2017-08-01
1083Tower of Cubes 0%(0/18)100%2019-04-13
1084From Dusk Till Dawn University of Ulm Local Contest 199911%(2/18)89%2017-11-04
1085Hanoi Tower Troubles Again! OIBH Reminiscence Programming Contest66%(21/32)34%2020-11-25
1086Freckles Waterloo local 2000.09.2319%(3/16)81%2017-11-12
1087The Necklace 14%(2/14)86%2019-05-07
1088Fire Station Waterloo local 1999.09.2587%(13/15)13%2018-06-17
1089Railroads Mid-Central European Regional Contest 20000%(0/10)100%2019-04-12
1090War 75%(3/4)25%2019-05-24
1091Tourist Guide 75%(3/4)25%2019-04-12
1092The Grand Dinner 40%(2/5)60%2019-05-30
1093The Problem With the Problem Setter 0%(0/12)100%2019-01-17
1094Is Bigger Smarter? Waterloo Local Contest Oct. 7, 199731%(304/989)69%2020-12-31
1095Distinct Subsequences 100%(2/2)0%2017-11-04
1096Weights and Measures UVA toolkit50%(10/20)50%2018-06-15
1097Unidirectional TSP UVA toolkit50%(7/14)50%2020-11-25
1098Cutting Sticks 67%(4/6)33%2019-12-19
1099Ferry Loading Waterloo local 1999.09.2543%(10/23)57%2017-08-20

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