Grokking 75: Top Coding Interview Questions
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Set Matrix Zeroes (medium)
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Problem Statement

Given a 2D grid of numbers called matrix, if any number in the grid is 0, set the entire row and column containing that zero to zeros.

The grid should be modified in place without using any extra grid.

Examples

Example 1:

  • Input: matrix =
[[2, 3, 4], 
 [5, 0, 6], 
 [7, 8, 9]]
  • Expected Output:
[[2, 0, 4], 
 [0, 0, 0], 
 [7, 0, 9]]
  • Justification: The element at position (1, 1) is zero. So, the second row and column are set to zero.

Example 2:

  • Input: matrix =
[[0, 2, 3], 
 [4, 5, 6], 
 [7, 8, 9]]

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