Codeforces Round 812(Div-2) Solutions || Problems A,B,C and D

Hey everyone! as always, here are the solutions to problems A-D of Codeforces Round 812 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/HGdtrN5mXe Book a one-on-one CP mentorship session with me here: https://memboro.com/sharmaharisam 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 0:45 - A: Traveling Salesman Problem 3:39 - B: Optimal Reduction 11:06 - C: Build Permutation 17:47 - D: Tournament Countdown