অদ্ভুত coders of Codeforces!!! (অদ্ভুত is a commonly used word in KUET meaning amazing)

We are thrilled to invite you to to participate in Replay of Ostad Presents Intra KUET Programming Contest 2023 which will be held on Tuesday, October 10,2023 at 19:00 (UTC+6).

You will have 5 hours to solve 13 problems. It is a beginner friendly contest. Teams preferred.

Thanks to the setters and testers of the contest: Mohaimin66, RUDRA_DAS, Likhon5, AngryBaymax, BrehamPie, Arnob, MinhazIbnMizan, weavile, Parvej, Noctambulant, Sabbir1807070, ShorifulSoumic, NM_Mehedy, Emon72, Creeping_Death_, brute__force__, _return_void_, Rafi, UmSuperNoob.

We hope you will enjoy the problemset.

UPD: Editorial

Can someone help me with this problem