We are glad to invite you to participate in Codeforces Round #449 ( both Div. 1 and Div. 2 ) which will be held on December 2, 17:05 MSK. There are seven problems, created by webmaster, ODT, dogther. This round is about the happiest girl in the world — Chtholly Nota Seniorious~! You will help Chtholly, Nephren, Ithea and Willem ( characters in the great novel and anime "What are you doing at the end of the world? Are you busy? Will you save us" ) to solve some problems.
(Image by gin_sei56(・.8・) on pixiv ) This round is our first round on Codeforces. Thanks to zcyskyaa for helping us, cyand1317 and Tommyr7 for testing the round, vintage_Vlad_Makeev and KAN for round coordination and MikeMirzayanov for Codeforces and Polygon platforms. This round has 5 problems in each division and you have 2 hours to solve them. The scoring will be announced shortly before the start of the contest. The contest is rated for both Div. 1 and Div. 2 contestants. Wish everyone high rating and accepted submissions!