Practice
P0628To doPoi2003 TrinomialOfficial CodemaoIntermediateP0629To doIPSC2003 Got Root?Official CodemaoAdvancedP0630To do[NOI2007]货币兑换CashOfficial CodemaoUpper intermediateP0631To do[NOI2006]最大获利Official CodemaoUpper intermediateP0632To douva4409 - Ironman Race in TreelandOfficial CodemaoUpper intermediateP0633To do[Usaco2007 Jan]Protecting the Flowers 护花Official CodemaoElementaryP0638To do[JSOI2007]麻将Official CodemaoIntermediateP0640To do[HNOI2006]军机调度Official CodemaoUpper intermediateP0641To do[Croatia2003]VOKITOKIOfficial CodemaoAdvancedP0643To doZju2429 Destroying The GraphOfficial CodemaoIntermediateP0644To do[Wc2004]孪生项链Official CodemaoUpper intermediateP0645To do[Baltic2001]KnightsOfficial CodemaoUpper intermediateP0646To do[Usaco2008 Oct]牧场行走Official CodemaoElementaryP0647To do[Usaco2007 Feb]The Cow Lexicon 牛的词典Official CodemaoIntermediateP0648To do[Usaco2006 Jan] Dollar Dayz 奶牛商店Official CodemaoElementaryP0649To do[Usaco2006 Oct]Building the Moat护城河的挖掘Official CodemaoElementaryP0650To do[Usaco2005 Mar]Checking an Alibi 不在场的证明Official CodemaoElementaryP0651To do[Usaco2005 Feb]Rigging the Bovine Election 竞选划区Official CodemaoElementaryP0652To do[Usaco2005 Open] Muddy roads 泥泞的路Official CodemaoElementaryP0653To do[Usaco2009 Feb]The Leprechaun 寻宝Official CodemaoElementaryP0654To doZju2672 Fibonacci SubsequenceOfficial CodemaoIntermediateP0655To do[2009国家集训队]拯救Protoss的故乡Official CodemaoAdvancedP0656To do[usaco2007 Nov]relays 奶牛接力跑Official CodemaoIntermediateP0657To do[Usaco2009 Nov]找工作Official CodemaoIntermediateP0658To do[HAOI2010]软件安装Official CodemaoUpper intermediateP0659To do石头剪刀布Official CodemaoAdvancedP0660To doSgu229 Divide and conquerOfficial CodemaoUpper intermediateP0661To do[Beijing wc2012]最多的方案Official CodemaoUpper intermediateP0662To do[HNOI2004]高精度开根Official CodemaoUpper intermediateP0663To doSuper PokerOfficial CodemaoAdvancedP0664To doPku3633 Copying DNAOfficial CodemaoUpper intermediateP0665To do[ZJOI2007]报表统计Official CodemaoIntermediateP0666To do[NOI2024] 树的定向Official CodemaoAdvancedP0667To do[Croatian2009]PLAHTEOfficial CodemaoUpper intermediateP0668To do[HNOI2003]历史年份HistoryOfficial CodemaoUpper intermediateP0669To do[SDOI2009]虔诚的墓主人Official CodemaoUpper intermediateP0670To do[Usaco2008Nov]安慰奶牛cheerOfficial CodemaoIntermediateP0671To doZju1015 Fishing Net弦图判定Official CodemaoUpper intermediateP0672To doSGU277 HERO 动态凸包Official CodemaoUpper intermediateP0673To do[AHOI2006]上学路线routeOfficial CodemaoUpper intermediateP0674To do[BeijingWc2008]雷涛的小猫Official CodemaoElementaryP0675To do玩具Official CodemaoUpper intermediateP0676To doUral1557Network AttackOfficial CodemaoUpper intermediateP0677To do[Spoj744] Longest PermutationOfficial CodemaoUpper intermediateP0678To do[Baltic2007]Sound静音问题Official CodemaoElementaryP0679To do[Baltic2007]序列问题SequenceOfficial CodemaoUpper intermediateP0680To do王者归来Official CodemaoUpper intermediateP0681To doSgu325PalindromeOfficial CodemaoUpper intermediateP0682To do[Cerc2008]Business CardsOfficial CodemaoAdvancedP0683To do[POI2006]Tet-Tetris 3DOfficial CodemaoUpper intermediate