noun which may take the genitive case particle 'no'
zero-sum
Used in economics, game theory, and general situations where one side's gain equals another's loss. Often appears as ゼロサムゲーム (zero-sum game).
This negotiation is a zero-sum situation.
In a zero-sum game, one person's gain is another person's loss.
Loanword from English 'zero-sum'.