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My first thought made it unnecessarily difficult. Well, the correct solution falls into a typical pattern: use DP to calc cumulative results of each cell, and then we use a sliding window to find max rect btw. 2 given rows.
https://www.hackerrank.com/challenges/mr-k-marsh/editorial
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原文地址：http://www.cnblogs.com/tonix/p/4644420.html
