INFECTED TRAIN
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A Train started its journey at x=-infinity is travelling on the x-Coordinate Axis. Given n passengers and the coordinates $b_i$ and $d_i$ for each of the $ith$ passenger at which they board and leave from the train respectively. Due to current COVID-19 crisis, the train is monitored at each mile/coordinate. The infection degree of the train at each mile is equal to the total passengers present in
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solution.cppC++17
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