Package g1301_1400.s1351_count_negative_numbers_in_a_sorted_matrix

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1351 - Count Negative Numbers in a Sorted Matrix.

    Easy

    Given a m x n matrix grid which is sorted in non-increasing order both row-wise and column-wise, return the number of negative numbers in grid.

    Example 1:

    Input: grid = \[\[4,3,2,-1],3,2,1,-1,1,1,-1,-2,-1,-1,-2,-3]

    Output: 8

    Explanation: There are 8 negatives number in the matrix.

    Example 2:

    Input: grid = \[\[3,2],1,0]

    Output: 0

    Constraints:

    • m == grid.length

    • n == grid[i].length

    • 1 <= m, n <= 100

    • -100 <= grid[i][j] <= 100

    Follow up: Could you find an O(n + m) solution?

    • 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 countNegatives(Array<IntArray> grid)

      • Methods inherited from class java.lang.Object

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