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Encryption Algorithm

Problem description. We have some textual documents that we need to read, but the documents are encrypted and we need to decrypt them, given the key.` We call the content of the encrypted sentence, the "ciphertext". We call the content of the decrypted sentence -- which is the same as content that was originally encrypted by our encryption algorithm -- the "plaintext". Fortunately, all the docum

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solution.cppC++17

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