Chef and Chess

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Tis’ the holiday season, and the Chef is inviting the best coders to his annual summer beach party. He invites $n$ people, and they all enter one after the other. The Chef has arranged a chess competition in his party, and needs to divide all his friends into pairs to play the game. Note : if any invitee is left unpaired, that person will play against the Chef, otherwise the chef will not particip

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solution.cppC++17

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