No equal guest pair

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2020 is going to end and everyone wants to enjoy the new year party. But the party has to follow some rules: The whole hall is divided into $N$ rooms, rules are: $1.$ Number of people in $Room$ $i$+Number of people in $Room$ $j$ ≠ Number of people in $Room$ $p$ $2.$ Total number of people in the hall has to be ( $2$ $to$ $the$ $power$ $of$ $N ) $-$1$. $3.$ Number of people in rooms h

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solution.cppC++17

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