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o(qlogn) is good enough. You need to consider the partial sum of the queries x instead of x and binary search for the index around which the sign is flipped after influence of this partial sum of x
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Absolute Element Sums
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o(qlogn) is good enough. You need to consider the partial sum of the queries x instead of x and binary search for the index around which the sign is flipped after influence of this partial sum of x