Hi !
As I had promised before, hard version of round #383 will be held on Friday, 16nd December 14:35 UTC. There will be 4 problems, each problem is a harder version of some problem in round #383. The contest is prepared by me. Please don’t copy your codes from previous contest.
I’d like to thank myself as usual, then Mike MikeMirzayanov Mirzayanov for the great Codeforces and Polygon platforms.
P.S. Prepare your fast input / output streams :P