Practice
P0006To doTriple JumpOfficial CodemaoUpper intermediateP0007To doBinary Tree BeautyOfficial CodemaoIntermediate44.4%P0013To doCrazy Nuclear PlantOfficial CodemaoIntermediateP0015To doEasy OperationsOfficial CodemaoAdvancedP0016To doSequenceOfficial CodemaoAdvanced5.7%P0017To doSirius IIOfficial CodemaoAdvancedP0018To dolinear-regressionOfficial CodemaoAdvanced3.2%P0019To dopermutationOfficial CodemaoAdvancedP0020To doracingOfficial CodemaoAdvancedP0021To doGood SequenceOfficial CodemaoUpper intermediate2.1%P0022To doPalindromeOfficial CodemaoUpper intermediateP0023To doA GraphOfficial CodemaoUpper intermediateP0024To doTriangleOfficial CodemaoUpper intermediateP0025To doSequence Rearrangement (arrange)Official CodemaoAdvanced31.8%P0026To doSequence Modification (modify)Official CodemaoAdvanced33.3%P0027To doThe Promise Toward the Sky (star)Official CodemaoAdvanced10.5%P0032To doWeatheringOfficial CodemaoAdvancedP0033To doSeriesOfficial CodemaoAdvanced15.2%P0034To doConcatenationOfficial CodemaoAdvanced21.6%P0035To doCountingOfficial CodemaoAdvanced12.2%P0040To doThe Sophists' Puzzle (puzzle)Official CodemaoAdvanced57.1%P0041To doCongruence (mod)Official CodemaoAdvanced33.3%P0042To doSnow Plowing (snow)Official CodemaoAdvanced50.0%P0338To doFloating-point Sum (SPJ)Official CodemaoBeginner14.8%P0400To doRobot (robot)Official CodemaoUpper intermediateP0401To doCandy StoreOfficial CodemaoElementary25.0%P0402To doClearance SaleOfficial CodemaoAdvancedP0403To doValue of a TreeOfficial CodemaoAdvancedP0404To do[NOIP2025] 序列询问Official CodemaoUpper intermediateP0405To do[NOI2024] 分数Official CodemaoAdvancedP0406To do[NOI2024] 集合Official CodemaoUpper intermediateP0407To do[NOI2008] 志愿者招募Official CodemaoUpper intermediateP0408To do[NOI2005] 瑰丽华尔兹Official CodemaoUpper intermediateP0409To do[NOI2005] 月下柠檬树Official CodemaoUpper intermediateP0410To do模积和Official CodemaoUpper intermediateP0411To do[HAOI2008]圆上的整点Official CodemaoUpper intermediateP0412To do[HAOI2008]硬币购物Official CodemaoIntermediateP0413To do[HAOI2008]木棍分割Official CodemaoUpper intermediateP0414To do[HAOI2007]反素数antOfficial CodemaoIntermediateP0415To do[HAOI2008]移动玩具Official CodemaoElementary33.3%P0416To do[HAOI2008]玩具取名Official CodemaoIntermediateP0417To do[SCOI2007]最大土地面积Official CodemaoUpper intermediateP0418To do[SCOI2007]修车Official CodemaoUpper intermediateP0419To do[SCOI2007]排列permOfficial CodemaoIntermediateP0420To do[SCOI2007]折纸origamiOfficial CodemaoIntermediateP0421To do[SCOI2008]天平Official CodemaoUpper intermediateP0422To do[SCOI2008]斜堆Official CodemaoUpper intermediateP0423To do[SCOI2008]着色方案Official CodemaoUpper intermediateP0424To do[SCOI2008]劣质编码Official CodemaoAdvancedP0425To do[SCOI2005]互不侵犯KingOfficial CodemaoIntermediate