A. WatermelonOnly if w can be presented as 2m + 2k watermelon can be divided to two even parts.
So w = 2(m+k), where m, k ≥ 1, that is
(w ≥ 4 и w - even) - necessary and sufficient condition for watermelon dividing.
Dear girls and women! Happy Women's day! On behalf of the Codeforces team I would like to wish you all the best!
May love and care surround you! May you always catch the admiring gazes of men! Stay beautiful and clever and keep making us happy!
It seems everyone is in the know that Codeforces Beta Round#3 didn’t take place in the appointed time. Seemingly, it happened because of the increased popularity of the site, on the one hand, and some of our bugs, on the other. For sure, it’s a pity that things went in such a way. On the other part, if everything had failed during the contest, it would have been worse. The contest is rescheduled for Sunday, 15:00 (Moscow time). Please be sure to check here for the start time in your time zone: http://www.timeanddate.com/worldclock/fixedtime.html?&day=07&month=03&year=2010&hour=07&min=00&sec=0&p1=179
I’d like to remind you that the project is in Beta yet, and we’ll work on the problem and try to fix it.
Thanks for your understanding,
According to The November Revolution of Colors and Titles, the text below is not an actual and just a historical document.
Not so long ago a new rating system was introduced at Codeforces. To complete the picture I’ll tell you about our Table of Ranks.
From this moment on all the participants will be given ranks that reflect their skills and abilities at such a hard field as computer science and problem solving. Judging by the results of previous rounds you will gain (or lose, I hope it’s not your case) points. If you score big success, you are promoted to a higher rank. You can see the dependence between rating and ranks in the table below. Moreover each rank has its color, which is reflected in the table.