Codechef Long Contest Problem

nikita00 (31)
problem link : https://www.codechef.com/JULY18B/problems/EQUILIBR

i didnt get from the editorial will someone please explain with examples.!
ne555 (10692)
¿what part you don't understand?
¿how to find the "win" cases? ¿how to compute their probability? ¿how to express the result?
nikita00 (31)
@ne55 each and everything!
ghostrideriit (50)
@nikita

Think for closed polygon
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