【from】https://medium.com/practice-in-public/the-beginners-guide-to-creating-and-selling-cheat-sheets-23756af06b12Thisis10xbetterthanyour50-pageebookHaveyoueverwishedyoucouldcutthroughthenoiseandgettotheheartofatopicquickly?E

AsalespersonmustsellnitemsinabagwithrandomIDs.Thesalespersoncanremoveasmanyasmitemsfromthebag.DeterminetheminimumnumberofdifferentIDsthefinalbagcancontainafterperforming,atmost,mdeletions.Examplen=6ids=[1,1

DescriptionAsupermarkethasasetProdofproductsonsale.Itearnsaprofitpxforeachproductx∈Prodsoldbyadeadlinedxthatismeasuredasanintegral

题意多重背包，但数据范围很大并且体积小于等于三。思路乱搞。很自然地考虑将物品按照体积分成三类。显然对于同一类的物品从最大开始取最优，那么有一个贪心的想法。直

postedon2022-09-2414:33:29|under题解|sourceproblem一个黑白矩阵，求以每个点为右下角，能围出的周长最大的全白矩形的周长。\(n\leq2000\)。solution试图进行

​​http://codeforces.com/contest/808/problem/E​​不理解为什么dp={cost,cnt1,cnt2}可以而dp={cost,cnt1,cnt2,cnt3}不可以上面那个不可以的例子是：  但是这

TodayisSaturday,August27,2022.MynameisLuke,andIwillbeyourteachertoday.IamoriginallyfromBostonintheUnitedStatesbutcurrentlyliveinThail

GroupLessonTodayisSaturday,August27,2022Welcometoourclass!MynameisLuke,andIwillbeyourteachertoday.IamoriginallyfromBostonintheUni