He is above the rating :)

OmarKimo Did you find something interesting? My son is 7 old and I'm thinking about that too.

In my opinion there is one difference in these two cases (Iraq and Ukraine). And maybe this difference is the reason why we see such different reaction on these two events in the world.

This difference is the discussion in UN. So you can google a resolution of UN about Iraq. So there was some report about Iraq (but I know that it wasn't confirmed after invasion as far as I heard).

While Russia invaded the Ukraine without discussion in UN. They just declared fascism and the genocide of russians without any proofs and started the war.

A one like Um_nik has appeared in Facebook and now there is the news feed which is adapted to a user by machine learning or something else. So I suppose it is a suggestion from Um_nik to make a "clever" main page which will be generated by AI. :)

What's the problem to do it by youself? You can do it in the list of registrants

https://online.acmicpc.org/

my own trance mix

In my opinion, one of solutions is to watch your thoughts. If there is one of anxiety, then ask yourself "Why is this important to me? Why do I think about it? What does this mean for me?". Maybe writing answear until you feel that true answear came. And then make choise of what you want.

I think "to participate in multitude of programming competition portals" can hide anxiety deeper.

I dont understand author's solution too. I have next solution (it maybe like authors):

at first there is next fraction:

then lets find [max a] — in my example it is a^n

at numerator we can factor out minumum of numerator. it is (without [max a] — at my example [max a] is a^n) or ([sum of a-elements] — [max a]), so then in brackets:

so now the answear is

then sum in brackets maybe have addition common divisor for x. For example:

for finding addition common divisor I do next: count different degrees at brackets. and go from degree 0 and try convert count degree of 0 to count degree of 1 and continue. I check that count of degree mod x == 0 and stop if its not so. when stop i can add to answear degree on what i stop. for example: on example stopping on degree 2, so to answear i can add 2. my solution:4986617