Powerhouses Again

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A country has N cities with certain population in each city. These cities are internally connected by two-way power cables. Among them, K cities have powerhouses. If a powerhouse is in a city, or is connected to another city via cables, directly or indirectly, you can provide electricity to that city, if you own the powerhouse. Initially X (X≤K) of the powerhouses are owned by you. Each powerhous

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