Codeforces Educational Round 120 Solutions || Problems A,B,C, and D

Hey everyone! as always, here are the solutions to problems A, B, C, and D of Codeforces Educational Round 120 If you are interested in attending free classes based on competitive programming and ask cp related and other doubts, then you are welcome to join my discord server. Link to the server: https://discord.gg/6Jgrfty9fJ Contact me here : Linkedin : https://www.linkedin.com/in/harisam-s-351868113/ Instagram : https://www.instagram.com/sharmaharisam/ Codeforces : https://codeforces.com/profile/sharmaharisam #CP #Codeforces #Upsolving #Contest Timestamps : 0:00 - Intro 1:13 - A: Construct a Rectangle 6:32 - B: Berland Music 15:11 - C: Set or Decrease 35:12 - D: Shuffle