Class Solution
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public final class Solution
2428 - Maximum Sum of an Hourglass\.
Medium
You are given an
m x n
integer matrixgrid
.We define an hourglass as a part of the matrix with the following form:
Return the maximum sum of the elements of an hourglass.
Note that an hourglass cannot be rotated and must be entirely contained within the matrix.
Example 1:
Input: grid = \[\[6,2,1,3],4,2,1,5,9,2,8,7,4,1,2,9]
Output: 30
Explanation: The cells shown above represent the hourglass with the maximum sum: 6 + 2 + 1 + 2 + 9 + 2 + 8 = 30.
Example 2:
Input: grid = \[\[1,2,3],4,5,6,7,8,9]
Output: 35
Explanation: There is only one hourglass in the matrix, with the sum: 1 + 2 + 3 + 5 + 7 + 8 + 9 = 35.
Constraints:
m == grid.length
n == grid[i].length
3 <= m, n <= 150
<code>0 <= gridj<= 10<sup>6</sup></code>
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Constructor Summary
Constructors Constructor Description Solution()
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