Theexplorist And The Card Game

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Theexplorist is fond of playing card game. There are $N$ number of cards numbered $1$ to $N$ on one side and blank on other side. All the cards are numbered side down i.e blank side up initially. He flips the cards to and fro changing their states as follows: Blank side up becomes numbered side up and numbered side up becomes Blank side up. He starts from one end and keeps altering the state of

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solution.cppC++17

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