It is Christmas

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Christmas is a festival of merry.Siddharth, a lover of solving puzzles, is gifted with a present by Santa Grandpa.Enthusiastic Siddharth, tried to open the gift,but Santa being tricky, made it difficult for Siddharth by locking the gift.A key(number) can unlock the gift.Now,Siddharth got a brain stormer.He is given $N$ numbers and of them he need to pick $k$ numbers with the condition : - The num

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solution.cppC++17

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