Hard version of this problem. Solve for N <= 2500 and K <= 2500.

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International Olympiad in Informatics

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Hard version of this problem. Solve for N <= 2500 and K <= 2500.

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Code for the full solution, if anybody is interested

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T <= 1000000. The TL was sufficient to allow both N^2 and N^2 log N to give full points.

For around 50 points, N was around 500. This was for an N^3 solution using the 2-pointer technique.

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