Editorial for DMOPC '15 Contest 2 P3 - Origami


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Author: cheesecake

For every cut we make, let's greedily cut the maximum amount of paper we can. Until we have more pieces of paper than K, we will always double the amount that we currently have with each cut. Once we have more than K, we can only obtain K pieces more with each cut, so we can use division to find the remaining cuts needed.

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


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