Card Swipe

CodeChefRating 1172Open on judge ↗

In the bustling CodeChef office, the entrance is equipped with a high-tech card swipe system. Each employee is assigned a unique ID card that they use to swipe in and out of the building. The system records every swipe, capturing the first swipe of an ID as in, second as out, third as in, and so on. Given an array $A$ consisting of $N$ IDs denoting $N$ swipes throughout the day, find the **maxi

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solution.cppC++17

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