Coal mines of Kharagpur

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Coal Mafias in Kharagpur are notorious for being one of the biggest perpetrators of crimes against officials protecting the mines. There are **n** mines in the area, numbered from **1** to **n**. Government wants to protect the mines by deploying some guards. As you know, governments usually don't have enough resources to assign a single guard for each mine. Instead, they know that some of the min

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