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Maximum Submatrix with distinct elements
By Confused101, history, 10 years ago, In English 
Given a 2D matrix of size nxm (n, m <= 400), Calculate maximum submatrix such that all of its elements are distinct? [maximum submatrix is submatrix whose area is maximum]
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10 years ago, hide # |
 
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407D - Largest Submatrix 3

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10 years ago, hide # |
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Suppose you fix two rows of the matrix. Can you come up with a way of calculating the answer for this "slice" in O(m)?

Hint: Incrementing the "right" column will impose some constraints (lower bounds) on the "left" column.

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