ACM ICPC World Finals Accommodation

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It's time of ACM ICPC World Finals. A lot of teams from all over the world have gathered to compete. Their stay has been planned at a grand hotel. As the organizers want people to interact with each other, they accommodated all the people in a single floor of the hotel. There are a total $n \times m$ rooms in the floor, which are arranged in $n$ rows, with each row containing $m$ rooms. Teams hav

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solution.cppC++17

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