85. Maximal Rectangle

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85. Maximal Rectangle

Given a 2D binary matrix filled with 0‘s and 1‘s, find the largest rectangle containing only 1‘s and return its area.

For example, given the following matrix:

1 0 1 0 0
1 0 1 1 1
1 1 1 1 1
1 0 0 1 0

Return 6.

85. Maximal Rectangle

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原文地址：http://www.cnblogs.com/guxuanqing/p/6163818.html