I read yesterday's 2062E1 - The Game (Easy Version) because i like playing games and specially on a tree. I read the problem and tried so hard on coming up with a strategy that i would pick to win. Since it's only rated 2000 in difficulty i thought i might be able to solve it if i give enough time to it.

I want your help in knowing that is the problem solved only using advanced solving/data structural technique or is it just about finding the strategy and implementation is not so hard. I want to know if i can solve it by myself without looking at editorial.

Thanks!