The secret number

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Ryan has a secret number, he has given you an array of numbers and a key, can you find that secret number? ###Input: The first line of input contains a single integer size of the array $N$ The second line contains $n$ integers, the elements of the array The third line contains the key, a positive integer $K$ ###Output: Output the secret number M ###Constraints $ 2<= N<=10^5, 1<=K<

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solution.cppC++17

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