Spy the neighborhood

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Sherlock is investigating a new case and has to spy a residential community with $M$ properties. The residential community is established at the edge of the city between $N$ + 1 lanes indexed 0 to $N$ beginning from the edge of the city and the lanes running perpendicular to the edge. To make it easier for him to spy, if properties from multiples lanes are to be spied upon, then those lanes must b

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solution.cppC++17

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