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CodeChefOpen on judge ↗

Chef is so fond of electronics. He wants to know who entered and exited his house at what time. He, with the help of arduino and raspberry pi, developed a system and installed it on a door that detects the entrance and exits of anyone in the house. The machine prints $I$ when someone enters and prints $O$ when someone exits. But since chef is not a very good coder, his code is full of bugs and thu

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solution.cppC++17

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