Friends Reunion

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Ram has $N$ number of friends, numbered from $1$ to $N$ , some of them are from his college,school and coaching etc.As the semester has ended they have decided to catch up.Ram’s friends are from different groups. He wants to meet each of the friend groups for 1 day .But he is busy with some projects , so he is having a limited number of free days $D$. Since you are a good friend of Ram , he as

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solution.cppC++17

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