2020 Carnival

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On the new year eve Chef and his friend Chefu went to the 2020 Carnival.At one of the stalls they saw an interesting game was being played. Both of them were very much excited to play the game and decided to go for it. The game consists of a bowl with chits, numbered from $1$ to $N$. Each time the Host randomly picks out two chits from the bowl ,say $x$ and $y$ ,and add a chit numbered as $a

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solution.cppC++17

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