Estimating progress

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Leha is a usual student at 'The Usual University for Usual Students'. Sometimes he studies hard; at other times he plays truant and gets busy with other things besides academics. He has already studied at the university for N months. For the ith month (1 ≤ i ≤ N), he has received some non-negative integer grade A[i]. Now he wants to analyse his progress for some periods of his university educati

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solution.cppC++17

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