Does anyone know if SGU online judge(http://acm.sgu.ru/) is down permanently? Or may be website address changed?
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Hi Everyone,
I'm a newbie here.I just started solving Div 2 A problems. I solved the following problem using a brute force approach. http://mirror.codeforces.com/problemset/problem/194/A
I was looking at the editorial here — http://mirror.codeforces.com/blog/entry/4673 I don't understand the logic behind "3n-k" being used.
Can anyone please help?
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