Package g1701_1800.s1727_largest_submatrix_with_rearrangements

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1727 - Largest Submatrix With Rearrangements.

    Medium

    You are given a binary matrix matrix of size m x n, and you are allowed to rearrange the columns of the matrix in any order.

    Return the area of the largest submatrix within matrix where every element of the submatrix is 1 after reordering the columns optimally.

    Example 1:

    Input: matrix = [0,0,1,1,1,1,1,0,1]

    Output: 4

    Explanation: You can rearrange the columns as shown above. The largest submatrix of 1s, in bold, has an area of 4.

    Example 2:

    Input: matrix = [1,0,1,0,1]

    Output: 3

    Explanation: You can rearrange the columns as shown above. The largest submatrix of 1s, in bold, has an area of 3.

    Example 3:

    Input: matrix = [1,1,0,1,0,1]

    Output: 2

    Explanation: Notice that you must rearrange entire columns, and there is no way to make a submatrix of 1s larger than an area of 2.

    Constraints:

    • m == matrix.length

    • n == matrix[i].length

    • <code>1 <= m * n <= 10<sup>5</sup></code>

    • matrix[i][j] is either 0 or 1.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer largestSubmatrix(Array<IntArray> matrix)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait