Editorial for DMOPC '18 Contest 6 P4 - Tank

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Author: r3mark

Sort the physical and magical attacks by their value and compute a prefix sum for each one. For each unit, we can binary search the attacks to determine how many attacks are completely negated due to their defense/resistance, as well as the total of the attacks which are not negated using the prefix sum. Then we can compute the total damage for each unit by subtracting their defense/resistance multiplied by the number of non-negated attacks from the total of the attacks not completely negated.

Time Complexity: \mathcal{O}(N\log N)


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