Maximum Submatrix with distinct elements

Правка en1, от Confused101, 2016-08-15 11:33:51
Given a 2D matrix of size nxm (n, m <= 10^3), Calculate maximum submatrix such that all of its elements are distinct? [maximum submatrix is submatrix whose area is maximum] 
P.S.

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en2 Английский Confused101 2016-08-15 13:18:12 7 Tiny change: ' (n, m <= 10^3), Calcula' -> ' (n, m <= 400), Calcula'
en1 Английский Confused101 2016-08-15 11:33:51 390 Initial revision (published)