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2023-04-24D. Pashmak and Parmida's problem 树状数组
ParmidaisaclevergirlandshewantstoparticipateinOlympiadsthisyear.Ofcourseshewantsherpartnertobeclevertoo(althoughhe’snot)!ParmidahaspreparedthefollowingtestproblemforPashmak.Thereisasequenceathatconsistsofnintege
2023-04-24Codeforces Round #308 (Div. 2) E. Vanya and Brackets
Vanyaisdoinghismathshomework.Hehasanexpressionofform,wherex1, x2, …, xnaredigitsfrom1to9,andsignrepresentseitheraplus‘+’orthemultiplicationsign‘*’.Vanyaneedstoaddonepairofbracketsinthisexpressionsothattoma
2022-09-29*Codeforces Round #235 (Div. 2) C. Team（贪心）
https://codeforces.com/contest/401/problem/C题目大意：给定n个0，m个1；让我们构建出一个字符串满足：不能连续2个以上的0，不能出现3个连续的1；可以的话就输出任意正确的结
2022-09-27Codeforces Round #240 (Div. 1) B. Mashmokh and ACM（DP）
https://codeforces.com/contest/414/problem/B题目大意：给定一个范围【1，k】，要求我们从这里面选出n个数字，并且满足任意两个相邻数字中后一个数字%前一个数字==0问我