Spanning Pairs

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Problem Statement For a given array of size N, let us define the following terms: (Assume 1-based indexing) left_span[i] = max( { j s.t. j a[i] } ). If no such value of j exists, it is set to 0. right_span[i] = min( { j s.t. j >= i && a[j] > a[i] } ). If no such value of j exists, it is set to (N+1). We need to calculate the number of unordered pairs of {a, b} such that their left_span and rig

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solution.cppC++17

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