Football Ties

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According to the Premier League rules, the winner of a game gets $3$ points while the loser of a game gets $0$ points. On the other hand, if there is a draw, both sides get $1$ point each. Two teams $A$ and $B$ played several games against each other and finally ended up with the score of $X$ and $Y$ points respectively. We do not know how many games were played. Find the **minimum** possible n

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solution.cppC++17

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