Hello, Codeforces community.
It is winter in Bangladesh and in Toph, a traditional long contest named Tough Winter Spar is currently ongoing. There are 10 problems in this contest to be solved in 10 days, and the difficulty was intended pretty hard.
Although the contest already started before, the last 2 problems were unlocked an hour ago, and I believe you might enjoy solving the problems of this contest, thus this post.
The problems of the contest were authored and reviewed by mainstring. fsshakkhor, 0pangktey0, rebornplusplus, souravvv, Mohaimin66, Hasinur_, ishtupeed, Muhimin_Osim, upobir, TarifEzaz, hjr265 and myself.
We look forward to your participation and hope that you find them useful for practice, best of luck in the contest.