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Title or Source
Problem ID
Problem IDTitleRatio(AC/Submit)DifficultyDate
1700Tournament 29 September, 2007 - Waterloo local contest0%(0/4)100%2017-11-17
1701Wedding 29 September, 2007 - Waterloo local contest0%(0/0)100%2010-08-15
1702Problem A:The Trip, 2007 24 September, 2006 - Waterloo local contest0%(0/1)100%2014-01-08
1703Mall Mania 24 September, 2006 - Waterloo local contest0%(0/2)100%2014-01-08
1704Moonshine 24 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1705WFF 24 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1706Cousins 24 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1707Problem A:Semi-prime H-numbers 30 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1708Rectilinear polygon 30 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1709Life Forms 30 September, 2006 - Waterloo local contest31%(28/90)69%2018-06-17
1710Tautology 30 September, 2006 - Waterloo local contest0%(0/0)100%2010-08-15
1711Rinse 30 September, 2006 - Waterloo local contest0%(0/1)100%2013-01-01
1712Problem A:Open Source 14 July, 2007 - Waterloo local contest 0%(0/0)100%2019-05-29
1713Antimonotonicity 14 July, 2007 - Waterloo local contest 0%(0/0)100%2010-08-15
1714Humidex 14 July, 2007 - Waterloo local contest 75%(3/4)25%2017-06-11
1715Tour de France 14 July, 2007 - Waterloo local contest 0%(0/0)100%2010-08-15
1716Texas Trip 14 July, 2007 - Waterloo local contest 0%(0/0)100%2010-08-15
1717Problem A:Trainsorting 15 June, 2008 - Waterloo local contest 0%(0/0)100%2010-08-15
1718Classified 15 June, 2008 - Waterloo local contest 0%(0/0)100%2010-08-15
1719Hot Spot 15 June, 2008 - Waterloo local contest 0%(0/0)100%2010-08-15
1720Snakes and Ladders 15 June, 2008 - Waterloo local contest 0%(0/0)100%2010-08-15
1721Balance 15 June, 2008 - Waterloo local contest 0%(0/0)100%2010-08-15
1722Problem A:Exchange Rates 23 September, 2007 - Waterloo local contest0%(0/0)100%2010-08-15
1723Conformity 23 September, 2007 - Waterloo local contest0%(0/0)100%2010-08-15
1724Pseudoprime numbers 23 September, 2007 - Waterloo local contest100%(1/1)0%2017-08-18
1725Carpool 23 September, 2007 - Waterloo local contest100%(1/1)0%2015-01-26
1726 Friend or Foe? 23 September, 2007 - Waterloo local contest0%(0/3)100%2015-01-26
1727Problem A:Laurel Creek 27 September, 2008 - Waterloo local contest0%(0/0)100%2010-08-15
1728Rocket Stages 27 September, 2008 - Waterloo local contest0%(0/0)100%2010-08-15
1729Virtual Friends 27 September, 2008 - Waterloo local contest30%(12/40)70%2017-08-24
1730Dominos 27 September, 2008 - Waterloo local contest16%(15/96)84%2018-09-30
1731Logo 27 September, 2008 - Waterloo local contest31%(8/26)69%2018-10-01
1732Problem A:Cranes 4 October, 2008 - Waterloo local contest29%(2/7)71%2018-06-15
1733WiFi 4 October, 2008 - Waterloo local contest0%(0/0)100%2010-08-15
1734算法:Exact Change(背包) 4 October, 2008 - Waterloo local contest62%(5/8)38%2019-06-03
1735Dominos 2 4 October, 2008 - Waterloo local contest0%(0/0)100%2010-08-15
1736Logo 2 4 October, 2008 - Waterloo local contest0%(0/0)100%2010-08-15
1737Problem A:Tic Tac Toe 13 June, 2009 - Waterloo local contest 0%(0/0)100%2010-08-15
1738Fire! 13 June, 2009 - Waterloo local contest 0%(0/0)100%2010-08-15
1739Nice Prefixes 13 June, 2009 - Waterloo local contest 0%(0/0)100%2010-08-15
1740Convex Hull 13 June, 2009 - Waterloo local contest 0%(0/0)100%2010-08-15
1741Slalom 13 June, 2009 - Waterloo local contest 100%(1/1)0%2011-04-03
1742Problem A:MC part deux 27 September, 2009 - Waterloo local contest0%(0/0)100%2010-08-15
1743Moveable maze 27 September, 2009 - Waterloo local contest0%(0/0)100%2010-08-15
1744Pick up sticks 27 September, 2009 - Waterloo local contest69%(9/13)31%2018-10-01
1745Digits 27 September, 2009 - Waterloo local contest30%(12/40)70%2018-10-01
1746Rotate to root 27 September, 2009 - Waterloo local contest0%(0/0)100%2010-08-15
1747Problem A:Alphacode East Central North America 200427%(3/11)73%2010-08-22
1748Anti-prime Sequences East Central North America 200420%(1/5)80%2010-08-22
1749Hit or Miss East Central North America 200433%(2/6)67%2010-08-22
1750I Conduit! East Central North America 20040%(0/0)100%2010-08-22
1751Roll Playing Games East Central North America 20040%(0/0)100%2010-11-02
1752Team Rankings East Central North America 2004100%(1/1)0%2010-08-22
1753To and Fro East Central North America 200446%(6/13)54%2018-10-01
1754Translations East Central North America 20040%(0/0)100%2010-08-22
1755Problem A:Crypto Columns East Central North America 20030%(0/0)100%2010-08-22
1756Decorations East Central North America 20030%(0/0)100%2010-08-22
1757EKG Sequence East Central North America 20030%(0/0)100%2010-08-22
1758Phone Home East Central North America 20030%(0/0)100%2010-08-22
1759Polly Nomials East Central North America 20030%(0/0)100%2010-08-22
1760Pushing Boxes East Central North America 20030%(0/0)100%2010-08-22
1761Squadtrees East Central North America 20030%(0/0)100%2010-08-22
1762This Takes the Cake East Central North America 20030%(0/0)100%2010-08-22
1763Problem A:Ball Toss East Central North America 20020%(0/0)100%2010-08-22
1764Galactic Breakup East Central North America 20020%(0/0)100%2010-08-22
1765Increasing Sequences East Central North America 20020%(0/0)100%2010-08-22
1766Pre-Post-erous! East Central North America 20020%(0/0)100%2010-08-22
1767Knockout Tournament East Central North America 20020%(0/0)100%2010-11-02
1768Plugged In East Central North America 20020%(0/0)100%2010-08-22
1769One Person East Central North America 20020%(0/0)100%2010-08-22
1770Slots of Fun East Central North America 20020%(0/0)100%2010-08-22
1771Problem A:Calendar Game Taejon 2001100%(1/1)0%2017-09-21
1772Wooden Sticks Taejon 20010%(0/0)100%2010-08-22
1773Modular multiplication of polynomials Taejon 20010%(0/0)100%2010-08-22
1774Human Gene Functions Taejon 20010%(0/0)100%2010-08-22
1775Flip and Shift Taejon 20010%(0/0)100%2010-08-22
1776Moving Tables Taejon 200164%(7/11)36%2018-10-01
1777Farmland Taejon 20010%(0/0)100%2010-08-22
1778Square Destroyer Taejon 20010%(0/0)100%2010-08-22
1779Problem A: Shopping 10 July, 2010 - Waterloo local contest0%(0/3)100%2010-09-06
1780Stack Machine 10 July, 2010 - Waterloo local contest43%(3/7)57%2010-09-06
1781Ideas 10 July, 2010 - Waterloo local contest100%(1/1)0%2010-09-04
1782HST 10 July, 2010 - Waterloo local contest0%(0/17)100%2010-09-06
1783Tunnelling the Earth 10 July, 2010 - Waterloo local contest38%(3/8)62%2018-10-01
1784Problem A:Nth Largest Value 2009 Greater New York Regional 73%(57/78)27%2018-12-19
1785Equal Sum Partitions 2009 Greater New York Regional 100%(5/5)0%2018-10-14
1786Balls 2009 Greater New York Regional 80%(4/5)20%2018-10-14
1787Running Median 2009 Greater New York Regional 28%(34/121)72%2018-10-15
1788The Next Permutation 2009 Greater New York Regional 43%(6/14)57%2018-10-14
1789Adjacent Bit Counts 2009 Greater New York Regional 60%(3/5)40%2018-10-14
1790Convex Hull of Lattice Points 2009 Greater New York Regional 0%(0/0)100%2010-08-29
1791Interior Points of Lattice Polygons 2009 Greater New York Regional 100%(1/1)0%2010-08-29
1792Theta Puzzle 2009 Greater New York Regional 18%(4/22)82%2018-10-19
1793算法:Catalan数 30%(102/340)70%2019-04-09
1794算法:x^n 33%(691/2093)67%2019-04-02
1795矩阵乘法 58%(21/36)42%2019-05-30
1796约数的个数 33%(477/1464)67%2018-12-01
1797改写程序 54%(137/253)46%2019-01-04
1798打鱼晒网问题 25%(106/418)75%2018-11-26
1799骨牌铺方格III 43%(62/145)57%2019-04-19

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