Educational Codeforces Round 91 (Rated for Div. 2)赛后总结
A-ThreeIndicesB-UniversalSolutionC-CreateTheTeamsD-BerserkAndFireballA-ThreeIndicesYouaregivenapermutationp1,p2,…,pn.Recallthatsequenceofnintegersiscalledapermutationifitcontainsallintegersfrom1to