With Positives only (and 0): The prefix sum is monotonic—it only goes up. This means if you move the right pointer, the sum always increases. If it gets too big, you move the left pointer to decrease ...

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Also published under: Kwai-Man Luk, K. M. Luk, K. -m. Luk, Kwai-man Luk, K. Luk, Kwai man Luk, Kwai M. Luk, K. -M. Luk Kwai-Man Luk (Life Fellow, IEEE) received the B.Sc. and Ph.D. degrees in ...